Fire Mage Liberation of Undermine Raid Tips - The War Within 11.2.7

By Preheat Updated: 2026/01/18

Fire Mage Liberation of Undermine Raid Talent Builds

Boss

Hero Talent

Import Build Directly In-Game

Preview Build

Sunfury

Frostfire

BothSunfuryFrostfireFrostfireSunfurySunfuryFrostfireMeteorComet StormIsothermic Core Fire Mage Liberation of Undermine Boss Buildsrecommended Vexie and the Geargrinders Fire Mage Talent Builds

Vexie and the Geargrinders Build

Frostfire

Sunfury

Vexie and the Geargrinders

The expose phase comes around 1 minute 45 seconds into the fight, but lasts around 45 seconds. This means you can safely use Combustion on cooldown leading up to it and still have Combustion for a portion of the amp.

Blink/Shimmer if needed when targeted by Spew Oil to position it for motorcycles charging in. Alter Time can be used before this to return your position and health.

Interrupt Repair prolong the intermission.

Cauldron of Carnage Fire Mage Talent Builds

Cauldron of Carnage Build

Frostfire

Sunfury

The Cauldron of Carnage

Having Combustion for Colossal Clash is great, but saving it may lead to less uses (depending on if you have the new tier bonus and your kill time). I recommend just sending Combustion on cooldown.

Each side has a debuff, so on higher difficulty you will need to swap sides to reset Blistering Spite and Galvanized Spite.

Flarendo's side is hectic, you will need to bait and soak Scrapbomb, spread for Molten Phlegm, and move out with Blastburn Roarcannon.

Torq's side is about minimizing movement to avoid being stunned by Static Charge. Move with intention and avoid jumping. Blink/Shimmer does not count as movement.

Use crowd-control on Voltaic Image to avoid them reaching you. Blast Wave and Volatile Detonation are taken to help with this. Avoid hitting them at teammates.

Rik Reverb Fire Mage Talent Builds

Rik Reverb Build

Frostfire

Sunfury

Rik ReverbPyrotechnicsGrand FinaleFrostfireSunfuryFrostfire

Frostfire: Every time Sparkblast Ignition summons Pyrotechnics you should drop a Meteor on them. Otherwise, Mastery: Ignite cleave from the boss.

Sunfury: Mastery: Ignite cleave from the boss, but if it looks like one wont die, give it special attention.

The boss has a frontal with Sonic Blast. Avoid standing near tanks.

Avoid standing on allies with Faulty Zap.

During Sound Cloud the raid will run between Amplifiers. The boss takes 99% reduced damage during this phase, but you can still attack him to make use of cooldown reduction from Kindling or to build buffs and resources.

You can cast spells while you channel Lingering Voltage from the Amplifier, but you can't use Shifting Power! Channeled spells interrupt it.

Mythic: Amplifiers have a shield that must by broken the collision of players with Faulty Zap.

Stix Bunkjunker Fire Mage Talent Builds

Stix Bunkjunker Build

Frostfire

Sunfury

Stix BunkjunkerRolling RubbishFrostfireSunfurySunfuryFrostfire

Throughout the encounter Rolling Rubbish will gather up groups of adds and dump them next to the boss, target the boss and Mastery: Ignite cleave.

Bombshells spawn with Territorial. They need damage before they move, but Fire is not very well suited for this.
Frostfire can use Meteor on these if the cooldown happens to lines up, but this is not recommended unless your group with struggling to deal with them.

Rolling RubbishMirror ImageCombustionGreater InvisibilityCounterspellScrap RocketsScrapmasterAlter TimeTrash Compactor Sprocketmonger Lockenstock Fire Mage Talent Builds

Sprocketmonger Lockenstock Build

Frostfire

Sunfury

Sprocketmonger LockenstockFrostfireSunfury

You will likely use a Warlock's Demonic Gateway to get closer to the boss during the intermission. Blink/Shimmer can also be used to bridge gaps or avoid damage.

The intermission is hectic for healers and has heavy damage. Use Mirror Image to reduce your damage taken for the duration. Blazing Barrier or Mass Barrier also helps.

This encounter is essentially a "Bullet-hell". Dodge the Blazing Beams and Rocket Barrages while avoiding fire and lightning on the floor.

Overlaps with Mega Magnetize are especially dangerous, since your character will be dragged towards them.

On higher difficulties, Foot-Blasters must also be soaked. If you are soaking this, make sure to Alter Time beforehand.

One-Armed Bandit Fire Mage Talent Builds

One-Armed Bandit Build

Frostfire

Sunfury

The One-Armed BanditSpin To Win!

Depending on your tank, you may need to focus Spin To Win! adds. Ideally, your tank will move to the correct adds and you can Mastery: Ignite cleave from the boss.

Frostfire: When Reward: Coin and Bomb, Reward: Flame and Bomb, or Reward: Shock and Bomb are active, many enemies will spawn. Try to have a Meteor ready to on them. Otherwise, Mastery: Ignite cleave from the boss.

Standing near the path of Pay-Line or tossing coins once they land rewards you with the High Roller! buff, but be careful! Getting hit by the coin will likely kill you.

Reward: Flame and Coin deals extremely high raid damage. Greater Invisibility, Mirror Image, and Ice Block can be used to mitigate this damage. Blazing Barrier or Mass Barrier also helps.

Withering Flames is a debuff that needs to be dispelled outside of the raid. Alter Time before moving out.

Mug'zee, Head of Security Fire Mage Talent Builds

Mug'zee, Head of Security Build

Sunfury

Mug'zeemostly SunfuryMastery: Ignite

This boss has a dedicated execute phase at 40%. Try to make sure Combustion is up for the start of it.

Earthshaker Gaol drops a circle of stone with an add in the middle. The area inside is line-of-sight. Mastery: Ignite cleave works through the Earthshaker Gaol walls with a little setup:

Begin with ranged, looking at the boss. Use Alter Time.

Run to the spot one Earthshaker Gaol circle is about to drop, Shimmer to the other one before it goes off.

Apply Mastery: Ignite to the Gallagio Goon, then activate Reflection to teleport into the other Earthshaker Gaol circle.

Apply Mastery: Ignite to the other Gallagio Goon, then activate Alter Time a second time to return to your original position.

Your Mastery: Ignite cleave is now fully online from the boss to the adds.

Unstable Crawler MinesSpray and PrayGreater InvisibilityMirror ImageIce BlockBlazing BarrierMass BarrierIce BlockHot Mess Chrome King Gallywix Fire Mage Talent Builds

Chrome King Gallywix Build

Frostfire

Sunfury

GallywixGreater InvisibilityIce BlockIce ColdMirror ImageAlter TimeBlazing BarrierMass BarrierBlazing BarrierBe aware of bombs and other ground effects when using Alter Time. Always check to make sure it is safe before taking it back!

This fight has many nasty damage events. As a general rule, if big hits are lining up with other damage events then use something big! If you are in danger, Greater Invisibility or Ice Block/Ice Cold. Otherwise, Blazing Barrier and Alter Time should suffice. Use Alter Time when full health before the damage goes out, and use Blazing Barrier right before the hit. Once your health drops, take the Alter Time (if it is safe to) and heal back to full.

In Phase 1, Scatterblast Canisters does massive damage in a cone. This must be soaked, and usually you have half the raid take turns with soaking it.

Move out with Sapper's Satchel.

In Phase 2, Giga Coils will activate at 100 energy. This does heavy damage.

While pulsing damage, Giga Blast lines will constantly activate. Dodge these and be sure to not point them at where Charged Giga Bomb are run or where adds are spawned.

Fused Canisters need to be soaked. Use defensives for these. In Phase 3, they turn into Mechengineer's Canisters.

In Phase 3, Gallybux Finale Blast will cast periodically. This is a big blue circle you need to move away from, and the further out you are the less damage it does. Alter Time before running out, then Shimmer away. Once the damage goes out, take your Alter Time to return to the boss with full health (if it is safe to).

Fire Mage Viability in Liberation of UndermineArcane IntellectScorchCauterize

Strengths

Weaknesses

Fire Mage Liberation of Undermine Raid Tips - The War Within 11.2.7

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