Stormfire actually looks amazing and at some point I want to do a build around it. I watched a video of a demonstration of the ability and for a rapid spammable attack with the right support I think it looks promising. If you combine that with rain of fire style procs and whatnot I think it will be awesome. I might be wrong on that score but I liked what I saw enough that after these other six characters are maxed that might be my next build.