I've noticed warriors have a lot of burst with ridiculously high damage. I've seen them charge towards an enemy and destroy them within a few cooldowns.
obviously a holy paladin, wings and exorcism spam ftw
Frost Dk all the way and I love it!
Sub rogue or Ret pally, (wings etc etc)
its still higher than most classes but the hard part is to get free casts. Arcane is actually pretty underrated utility-wise, just doesn't have the extra reset it needs IMO. also takes quite a bit of skill to play well and survive, not like the spec used to be with ArcBarrage spam.