Originally Posted by
Pent
Well, in my current gear arcane seems to be slightly better than frost on single target Patchwerk style fights, with fire about 10% below that (Simcraft). With Helterskelter enabled, frost is better than fire and arcane falls behind. For AoE, I'm not quite sure but I imagine frost would be worst there, as you don't have moving AoE + blizzard is quite mana intensive, but the change to Arcane Explosion seems rather decent, however it probably doesn't have the potential of fire AoE.
Edit: interesting, new sims show that fire < arcane < frost, on helterskelter (my gear).