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Comment by rays

Once your crit rate hits an obscene percentage, you can actually get 4 critical strikes with this buff if you use Fire Blast immediately after your last fire spell.

Comment by Chandrialla

I like to keep a set of crit gear handy for farming (rod of the ogre magi, gordok handwraps, etc.)...for fire mages, nothing can make the farming easier than pulling off a greater than usual amount of crits.

Comment by 8004

Combustion makes life a lot easier for mages. Just pop this spell every time it's not on cooldown and you'll find mobs and players a like falling at your feet.

Even the initial 10% crit chance is a HUGE bonus. Fire mages without this are pretty much lame.

Comment by 9151

Since critical strikes can trigger Ignite and Master of Elements, a heavy fire mage would do well to get this talent. Works very well in AOE situations as well, get your crit chance up as high as possible then after 2 successful crits, throw a flamestrike or blast wave in there. Not "on demand" damage like Presence of Mind or Arcane Power, but that extra 10% crit right off the bat is nothing to scoff at. Plus, it actually saves you mana through MoE rather than costing more like AP does.

Comment by skitzosmeagol

Combustion is an amazing skill, with multiple mages in your guild you can initiate combustion rotations (Mage #1 Pops combution and begins to cast and fire a fireball Mage #2 Pops combustion both mages start casting and shoot Mage #3 Pops combustion etc...) With my fellow mages in my guild we have managed to keep rolling ignites up the whole fight (pre 2.0, now you must roll your own ignites) This talent is not PVE only i use this time everytime it is up in bgs and since it is a buff i activate it and im worry free till the cooldown is up again. Crits on fire are devestating, and you can reach alot more DPS with combustion than you ever could with POM.

Comment by 9788

If you're far enough away, you can also use scorch to get the 4th critical (as described in the first comment) providing fireball hits at the same time.

Comment by cheesepizza

great spell must have if your a fire mage also you need it to get dragon's breath too ^^

Comment by kuram

I have a question. Let's say it is at the 30% mark, and you crit for the first time. Does the chance to crit go up to 40%, or stay at 30% because you critted off it? I think it would move up, but I need to make sure

Comment by wowzer

I am a fire mage, and a crit monkey, so naturally I love the Combustion talent. My only problem is I dont always pay attention to the cooldown and so I may let quite a bit of time go by before proc-ing it again. Does anyone have an auto-proc macro for Combustion?

Comment by sijtze

When you have only 1 crit left you can use fireblast while your fireball is still flying, you will obtain 2 crits while you only should have gotten 1, just like the shatter effect on frostnova, just thought you should know:)

And when you use an aoe fire spell like blastwave or dragon's breath while you have only 1 crit left it will still have its critical strike chance increased against all targets,

I usually get around 7 crits from 1 combustion when used right.

Your crit chance with fire spells will increase by 10% every time your fire spells crit or hit,

Comment by 72155

Every time a Fire spell doesn't crit, you gain +1 charge. "Doesn't crit" includes full resists, normal hits, possibly immunities. You also gain a charge when you crit, if you haven't crit more than twice with Combustion active (in which case, it fades).

For AoE spells, the current number of charges are considered (no matter how many targets you hit and in which order). If you hit 9 targets with 1 charge, the spell will have 10%+ your spell crit chance to crit, and if 2 or less than 2 targets were crit, you'll have 10 charges (meaning 100% chance to crit with the next spell).

Comment by Urbanmech

Its nice when you pop combustion, thrown down a flame strike... and the crit chance goes up to 100%... then you run in and blast wave :D

If you remember the old combustion, it was like cold blood. next fire spell has 100% crit. I kinda liked that in some situations moreso than the new one

Comment by Avoodibaba

Odd it hasn't been mentioned (correct me if I'm wrong, just an observation from levelling), the DoT from pyroblast and fireball count as 'hits' in this sense.

Since these ticks can't crit, they are useful in building up free charges :)

Comment by Raningast

Cooldown lowered to 2 minutes in patch 3.3.3

Comment by Meldoron

Remodeled slightly, so now you don't need to reapply dots! It will just do the same amount of damage as your dots instead of consuming them. Rejoice even more!

Comment by 680211

This spreads to additional targets with Impact talent.

Comment by 42935

Here's how this spell works in 4.0.1 and beyond:

1. You cast Combustion on an enemy target.
2. It deals a small, insignificant amount of fire damage on its own.
3. Then the game adds up the total DPS of all the fire dots you have on the target.
4. A new dot, called Combustion, is placed on the target that ticks for that total dps, every second for 10 seconds.

So let's say the following dots are on your target when you cast Combustion...

Ignite ticking for 3000 every 2 seconds (1500 dps)
Pyroblast ticking for 900 every 3 seconds (300 dps)
Living Bomb ticking for 1500 every 3 seconds (500 dps)

Combustion will tick for 2300 every second for 10 seconds, for a total of 23000 damage. Combustion's dot ticks are capable of critting and you also get more ticks the more haste you have. You can also spread Combustion to all targets in about 10 yards with Impact procs for some disgusting AoE damage.

Comment by 116979

Am I the only one who wants the old Combustion back? Bleh.

Comment by 139162

My numbers show that this is still quite impressive single target.

Just compare to the Affliction Warlock, the traditional master of DOTs.

(Pre-spell power contribution)
Mage:
Pyroblast: 872 / 12s = 73DPS
Living Bomb: 1600 / 12s = 133DPS
Ignite: Variable, so let's take the lower bound = 0 DPS
Subtotal: 206
Combustion: (1043+(206*12s)) / 120s = 30 DPS
Subtotal: 236
Mastery: 20%

TOTAL: 284 DPS

Warlock:
Corruption: 882 / 18s = 49 DPS
Unstable Affliction: 1115 / 15s = 73 DPS
Bane of Agony: 1524 / 24s = 63 DPS
Subtotal: 185
Haunt: 20%
Shadow Embrace: 15%
Mastery: 13%

TOTAL: 283 DPS

(This is base damage, and I don't know what int spell power coefficients go to each spell, but I'll assume for convenience sake that they all scale the same as 4.5s plus spells, and that their tooltip base amounts actually stand for something, for once.)

So single target in an abstract raid environment over the relevant 2 min period, a mage who DID NOT talent Ignite and a warlock will do about the same amount of damage in DOTs. This assumes that Hot Streak is up enough so that the pyro debuff is nearly always on, and it looks that from Blizzard's giving it a ppm chance on every crit, not just consecutive crits, that this will indeed be the case.

Who knows how Ignite really works, but I'm guessing that any talented mage is going to crit twice in a row, check to see if the pyro debuff is up, and if it is, apply combustion before hotstreaking that next pyro. Assuming 2x Fireball crits, that Ignite is going to be about 1600base / 4s, or 400 DPS. That alone doubles the effect of Combustion into a 60 base DPS per minute instant spell in a prolonged rotation. Something seldom forgotten also is that this will actually take skill to use, rather than just waiting for a phase in the fight where you can cast for 10s and popping it automatically. Personally, I like this combustion best of all the versions we've seen.

One important thing to remember also for PvP'ers is that in that 10s where the Combusion is up, Mage passive DOTs far exceed those of an affliction warlock. Very juicy also is the instant damage kicker, something that no warlock DOT except Immolate has.

My questions are these:
1) Does casting Combustion refresh all the DOTs on the target? Wording of the tooltip is strange.
2) Does it share a cooldown with anything, such as Fireblast?
3) Will an Impact'ed Fireblast spread Combustion, and if so, will the DOTs on the new target be refreshed or will their durations be carried over from the original target?
4) If the initial damage crits and procs ignite, will that ignite get absorbed into the DoT also?

Comment by 325788

Truly a great spell. In my opinion, better than before.

It combines Ignite, Pyroblast and Living Bomb DoTs' dps doing a small amount of initial damage and a 1/sec ticking DoT.

It is affected by haste, so you can have it tick 11 times instead of 10 with a small amount of haste and around 14+ times, if you hero/bl/tw is active at the time you casted this.

Can be spread with Impact -talent. The DoT lasts as much as the original DoT, which you just spread.

I've had this deal 7k non-crits cause of big ignite DoT. So you can easily have 100k dmg/gcd.

Best used, when you´have all DoTs on target and you get a fireball- or pyroblast crit. Ignite DoT is biggest part for making your Combustion successful.

But without a doubt, this is bestest used, when you get a Hot streak proc and can cast Fireball+Pyroblast!, with both critting!

Comment by exploid

Because this + impact proc ain't real "aoe" they do not suffer from AoE dmg reductions. That means you can pull whole instances and there is no damage reduce.

I pulled around 70 mobs on the the general boss in AQ20 and they all died withing seconds.

Pop mirror images
First living bomb
Blastwave to get instant pyro and impact proc
Use instant pyro and hope it crits for ignite
Combustion
Spread it with fire blast
Iceblock while you watch carnage :)

Comment by 163330

Wait, wait wait. New mage here. Even newer fire mage. You telling me, I hit someone with a crit pyro, then pop LB and combustion, that $%#& will spread if I hit FB? All the dots, including combustion spread?

Comment by 120634

An extremely handy addon for tracking how much damage your Combustion can do is Combustion Helper. It approximates the DPS of Combustion by taking into account Ignite, Pyro, and Living Bomb ticks. It's pretty accurate, however, depending on your latency might not get updated quickly enough.

Takes some practice to get used to it, but I've managed to pull 200-220k single target Combustions with it (A couple of Pyro crits in the Ignite.)

For the mages who are not uber-hardcore raiders, and are around iLvl 356, according to the addon, about 15k DPS Combustions are the most efficient. They're relatively frequent, do about double the damage if you were to open with a Pyro and just fish for any crit, and even if you get to use it only once or twice, instead of two or three times, the damage done by the spell is still significantly more.

Pro tip: On Valiona, if you can get the group to avoid the Dazzling Destruction in such a way that the tank can keep her in the middle when Theralion lands, you just might be able to get Impact off and watch your DPS spike up significantly.

Comment by KnightProwler

Thanks guys, very useful stuff. Now... n00b question: should I recast Living Bomb before popping combustion?

Comment by KnightProwler

Takes some practice to get used to it, but I've managed to pull 200-220k single target Combustions with it (A couple of Pyro crits in the Ignite.)

Ignite is, and has been bugged since it was first introduced to the game. ''Ignite muching'' no longer happens. Now, however, a 2nd crit during ignite will add another second to said ignite and 40% of the 2nd crit's damage. Problem is, should you crit again before that ignite burns out, you get nothing for it.

Here's the real issue: a Flame Orb crit followed by a Living Bomb (tick) crit followed by 2 Pyroblast crits (within 4 seconds of each other) = a Flame Orb crit and a Living Bomb crit ignite. A Scorch crit followed by a Pyroblast dot crit followed by a Pyroblast crit = a Scorch crit and a Pyroblast dot crit ignite. Blizzard is working on this but there's no telling when it will be fixed and when it is, fire mages everywhere will whine they've been nerfed, badly. They will have to nerf us in order to fix ignite and keep things balanced ;P

@Oregac Either combustion helper is full of s***, your ''single target'' was not single target, or your pyroblast crits for over 200k

Comment by 632490

This current version of Combustion is a lot better than the original, and it makes us Fire Mages work a bit for our dps.

Comment by 754478

Ok how big of a damage increase would there be if you use FFB instead of FB since FFB has a stackable dot?

Comment by 120634

As of 4.1, Combustion is no longer on the GCD (global cooldown) therefore be slightly more careful when using it and make sure the Pyro hits.

Comment by 826667

From 4.1 patch notes:

"■Combustion no longer has a global cooldown."

It still has a cooldown of 2 minutes.

Comment by orcsmash

Here's a tip: Most of the time, Ignie & Pyro DOT are active simultaniously only for a very short time, and you may be in the middle of a cast when the stars align and it's the perfect time to use Combustion, so make a Macro with /stopcasting so that when you hit the button whatever you're casting is cancelled and Combustion is applied before the window of opportunity is lost.

/stopcasting
/script PlaySoundFile("Sound\\Creature\\Ragnaros\\RagnarosSpecialAttack01.wav")
/cast Combustion

Comment by Angxia

According to the 4.3 patch notes, they are buffing pyroblast and living bomb dot damage. If these changes go live, we can expect a pretty big buff to combustion. Now make it undispellable please

Comment by 128072

One question. I have never played a mage and I'm intrigued... When you activate this spell with other dots ticking on your target, and create new dot, do old dots remain or are they all removed and only combustion dot remains?

Comment by 442479

In case it's not obvious: this now *only* uses ignite damage. Living Bomb was removed from Combustion in 5.0 when it became an optional talent, and Pyroblast Combustion was removed in 5.1.

Comment by 854121

ETA on the change to Combustion's tool-tip?
As sad as it is:

If the target is currently affected by your Ignite, it also burns the target for additional damage equal to half the damage per tick of the Ignite every 1 sec for 10 sec.

Comment by diogogb

Spell power coefficient is 100% SP
So, as of 5.2, the formula for the damage at level 90 is: 1041 + Spell Power

Comment by 778047

20% ? Nooooooooooooooooooooooooooo

Comment by Thottbot

nobody's got anything to say about this? I think this is a cool spell, but it will be nerfed soon with the new mage talents..

Comment by Thottbot

I don't think it is nerfed so much as fundamentally changed, possibly for the better. Once activated, every fire spell has a chance to crit, and if it doesn't it increases your crit chance by 10%, so you could spam something small first then still end up with your big Pyroblast. It isn't nerfed, and it quite possibly could prove to do more damage than the original had managed.

Comment by Thottbot

You hit this spell. A buff come up and it stays for.. to log of or.. well for very long. When you used 3 crits the cooldown starts so.. Its realy no big use to walk around with it but.. why not?

If you're hitting/critting any firespell for example Pyroblast/fireball the crit chanse of any firespell will go up 10% Notice its hitting/critting

I use to (only tryed one instance yet tho) Spam scorch untill I got 2 crits or over 70% crit chanse. When I made that I use a non fire spell for example frostbolt. Then I tell my party I wanna pull with pyroblast:) It's nearly a defently crit! And with ignite it some damage to pull with. Gotto have a good tank to do this tho. Notice that the crit chanse increeses so if you get it up to 70% your base crit is like 15% its 85% to crit! GOGO
If you wanna get some awsome crits in the bg starts you can go outside for examlpe ogrimmar and try to crit up this thingy so you can get a fresh highly crit pyroblast (to bad you can't have POM and this :/ its a hard desition. My advise is if you wanna grind and go PvE solo take this one. If your going PVP POM is a must)

If anyone has anything to add do it:) Please tell me if you find more ways to use this with:)

Nudel at Defias Brotherhood

Comment by Thottbot

PoM is not a must for PvP, in fact considering the destruction of the arcane tree in 1.11 PoM and ICS are becoming obsolete considering the crap you have to first put points into. With no imp AE or evocation left in the arcane tree the majority is quite useless.

As for this ability, anyone who thinks of putting a point into this for anything other than PvE (which it's marginal for anyway) should be shot, even with a scorch build it's a horrible waste. You're crazy if you take this over PoM or iceblock, it's purgeable too, so if you come up against a shaman, lock w/ felhunter, or priest, kiss it goodbye.

Comment by Thottbot

PoM is still one of the best talents, Combustion is realy good but i think ill take it in BC with PoM togheder. it will be pure imba. anyway arc. tree is not useless if u r going PvE to. cose there ara things like clear cast, arcane resilience and imp. cs. its realy use full but bad luck is u have to spend points on tier 1 talents. they are mostly useless :/
But i think for a fire mage is PoM one of most important talents (for frost is better barier i think)
and doesn't combustion just increases your crit chance for 10% 'till you crit 3 times? and when is CD start running? when you use it or when u crit 3 times? thats the question

Comment by Thottbot

nvm

Comment by Thottbot

I am a lvl 50 fire mage, and it seems like its easier for me to kill mobs or alli when i have this activated.

I just wish I didint have to wait so long after using it, to beable to use it again.

Comment by Thottbot

combustion pwns the hell out of PoM because u get 3 crits! and not just any crit its a fire mages crit =) thats the best kind because you do insane damage and you get 40% of that insane damage with a DoT effect.

The cooldown is 3 min but so is PoM. but PoM is a 1 time insta cast with a 3min cooldown and im not gonna wait 3min to insta a fireball that has a low chance of criting.

Comment by Thottbot

this is not POM vs Combustion

Its POM AND Arcane power versus combustion

Arcane power owns all u can pop missles or fireballs for 10 sec then get a free pom AP pyro

combustion just does not compare.

and you have full control over AP and POM, combustion is still based on a proc

Comment by Thottbot

CAN YOU USE COMBUSION AND POWER OF MADDES AT SAME TIME?

Comment by Thottbot

Before this talent was 100 % chance to crit of your next fire spell, it was same as elemental mastery (shaman)

Comment by Thottbot

w/o the reduced cost :(

Comment by Allakhazam

This spell seems insanely good... am I not understanding this correctly? Doesn't this mean that on average you will get critical strikes 20% of the time or better? If there is no mana charge, and no cooldown, this seems like it'd be better than Arcane Power for an Arcane/Fire mage.

Comment by Allakhazam

Links

Combustion

Combustion	Level 90

10% of base mana	40 yd range

Instant	45 sec cooldown

Fire (Hotfix Passive)
Instantly deals 1041 Fire damage and stuns the target for 3 sec.

If the target is currently affected by your Ignite, it also burns the target for additional damage equal to 50% (20% in PvP) of the damage per tick of the Ignite every 1 sec for 10 sec.

When cast, resets the cooldown of your Inferno Blast ability.

Instantly deals 1041 Fire damage and stuns the target for 3 sec.

If the target is currently affected by your Ignite, it also burns the target for additional damage equal to 20% (20% in PvP) of the damage per tick of the Ignite every 1 sec for 10 sec.

When cast, resets the cooldown of your Inferno Blast ability.

Spell Details

Duration

n/a

School

Fire

Mechanic

n/a

Dispel type

Magic

GCD category

n/a

Cost

10% of base mana

Range

40 yards (Long)

Cast time

Instant

Cooldown

45 seconds

GCD

0 seconds

Effect #1

Script Effect
Value: 20
PVP Multiplier: 1

Effect #2

School Damage (Fire)
Value: 1
PVP Multiplier: 1

Effect #3

Dummy
Value: 20
PVP Multiplier: 1
Server-side script

Flags

Do Not Sheath

Combustion

Buff

Spell Details

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