hi, and welcome! : )

definately frost. it's what i'm leveling mine on (also have 2 mages) and i find it much easier than fire (which i had on my main).

at the moment, as i'm RaF leveling i focus on quests but once i hit 60 and the bonus xp is gone there are a number of places where aoe farming with two frost mages on rested xp would keep the levels ticking away at a decent speed anyway.

- nasaRed