Alright, Ice Gaunt wins vs. Fire Staff all the way, for me. I think the fire staff would likely do better for me in group scenarios, but the gauntlet just clicked way way better for me and I found it a lot easier to use. Fire staff abilities were all awkward for me to land hits with, plus I prefer the mana regen on the ice gauntlet.
A good example of why I prefer the gauntlet is Blizzard (or whatever that AOE is called) vs Meteor. Meteor does more damage but you have to channel it, which is really awkward to do when not in a group. Mobs will rush you and knock you around, so it’s hard to apply much damage or to keep them in the radius. Blizzard on the other hand is fire and forget. You drop a blizzard in a similar sized AOE and it ticks away while you can do other things: run around, block, launch other attacks. It also slows, so it’s easier to keep guys in the blizzard.
While technically Meteor does noticeably more damage, in practice I like blizzard a lot more. If I were in a group and had a tanky character holding the mob in place, I might like the fire staff attacks more than I do. But for solo play, gauntlet all the way.