The two tanks taunt of each other to avoid that the debuff from impale doesnt grow more then up to 3 stacks.
Spread out.
Move out of fire.
Kill the Snobold Vassals.
Phase 2: Acidmaw and Dreadscale
Spread out.
Kill Acidmaw first.
If you got the Paralytic Toxin debuff, run to a player with the Burning Bile debuff. It will remove the debuff. If you do not do this, you will get paralyzed after some time.
Heal player with Incinerate Flesh until debuff gone (60k in 25man). If this is not done, the player will explode and aoe damage all targets in a very large area.
Move to outer walls and move along them until debuff is gone if you get Legion Flames
Dispell "Fireball" debuff on tank
Ranged DPS has to kill the adds as fast as possible