Played around with some Frost spec the other day actually. Single target mobs were pretty much non existant after the first cast. And if they some how survived Ice lance would polish off the sliver that was left. Mana usage was practically null

i also ran AOE with Arcane... was very fun but you would have to sit and drink a couple times.

Either way Mages have become one of my favored sets of alts.

Have yet to try fire... maybe later this weekend