It's worth noting that lots of people have reported needing at least 390 First Aid skill in order to be able to see the Manual: Heavy Frostweave Bandage drop in the first place.
Need a dispenser here!Need a dispenser here!Need a dispenser here!Need a dispenser here!Need a dispenser here!
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Another way of getting the Ultimate Triage achievement, is to simply use bandage after a duel.
Dropped off a mob in Sholazar for me at 75, a very lucky find indeed :D
Is there a dcotor in the house?
You need to have 400 Band-aid skills before you can see this thing and most of the time it will drop in instances with level bigger than 75. Mine dropped from Gundrak. Since the begining of the WotLK i did about 5-8 instances and saw it dropping twice so if you want it you can either do a few instances (and you should anyway) or kill random mobs in random places until the hell freeze... i take the isntances :)A good strategy is to level your band-aids until 400 so you can be eligeble to get the manual when it drops... and it will drop.
I've had one drop in VH for me while I had <400, I rolled and won it. So there you go.
The book dropped for me in Grizzly Hills at 74 and 391 FA while grinding out quests solo. I guess I'm just lucky like that.