With the 30% nerf rolling in a couple weeks ago I decided to begin experimenting with frost. I know there aren't a lot of us... :P but I was hoping there might be some floating around to spark up some discussions about this under-played spec.
I'm not 100% sure how strong spreading ignite/FFB dot is, but I've been running a 0/9/31 build including impact, over getting 2% haste in arcane. Coming from playing fire and the good ol' DoT spreading, I was wondering if anyone could persuade me otherwise. :P
The biggest problem I see is when you're spreading FFB on most fights other than Yor'Sahj (presuming you hard-cast FFB to ensure it's still rolling on the boss) you will be spreading ignite + 1 stack of FFB, and not a 3 stack.
However it should still provide more dps, particularly on madness thanks to additional spellweave procs from the DoT on the bloods.
Another thing I have been doing is hard-casting FFB around 4.5 seconds remaining on the DoT to ensure it gets refreshed without dropping the 3 stacks.
The most irritating part of frost so far has been wipes, where the overly long cooldown of Cold Snap isn't ready in-between fights, stopping you from being able to use it twice on most fights. Luckily, with all these nerfs, wipes don't exactly happen too often.