I've always thought that Freeze should work like it does for enemies, and be a puddle that gives freeze debuff stacks, eventually ending in Frozen at 5 stacks. That'd make it so OP. I really like your ice flare idea though. God that'd be BEASTLY.
Now I'm curious to see if Freeze and B2 can be worked into a viable rotation. I'll poke around with it after work.