Yeah, your build could use a little tweaking. First of all, you want to put 3 points into Incineration in the Fire tree for the added crit chance to AB. Personally, I don't bother with Arcane stability, although that's really a personal choice. You should really put that last point into Arcane Mind, and I'd add the last point into Student of the Mind as well. You don't really NEED Slow for raiding, although it can be useful for grinding dailies. I'd say it's up to you whether you keep 2 points in Arcane stability or fill out SotM and keep Slow.
Whoops. Just realized that you were asking about a FFB respec. I don't really know much about the FFB spec, but if you stayed arcane I do think you could stand to do the improvements I listed above to help improve dps. I know you weren't asking about that, but there you go. >.>
Edited, Apr 27th 2009 1:44pm by PigtailsOfDoom