I think, unless I'm just better than I think I am, that frost TB is a little too good. I went 32-0 KD and 500000 damage in a game that probably didn't last more than 30 minutes. Amazingly fun to play, but at the end I was level 20 to everyone's 13 or lower... so, it seems off. Shatter, in my opinion, regardless of my skill, is a bit too good at max rank. I was taking out people at a bit under half hp with a 3x shatter.