Is blizzard not feasible as AOE boxer vs AE?

[Lyonheart]

I never find that having to drink after every pull or two to be a big deal.. as i loot everything..by the time im done looting, everyone's mana is topped off

[Homer]

I never find that having to drink after every pull or two to be a big deal.. as i loot everything..by the time im done looting, everyone's mana is topped off

I find my priest lacking in the mana regen department between pulls, at 37 now, sometimes I need a full drink and then some, WTB level 40 for the 35 water.

[Yukzor]

I find my priest lacking in the mana regen department between pulls, at 37 now, sometimes I need a full drink and then some, WTB level 40 for the 35 water.

So right now im specced frost at level 34 with shatter. My gameplan has been nova...flamestrike ae ae..nov ae ae ae ae and everything dies due to 50% crits on flamwstroke andae.....is there anyway to be even more efficient or a better pec? I find that frost shatter gives way better crits than arcane talents....but maybe i missed something and there is a better spec?