Yeah, I hate to derail this thread, but without knowing what "BFC" means, it's hard to build an optimal party.
Can a dragonfire adept use Entagling Exhalation? I've never played a DFA, but my understanding is that's a pretty big deal for them.
Can a warlock use Chilling Tenticles? It's not the only thing warlocks can do, but it's both potent, and a fairly unique power compared to the others.
Hell, can your fighter be a tripper, or does this explicitly pertain to just spells?
Is Glitterdust BFC? It's a dubeff and not terrain modification, but it certainly "controls the battlefield".
So, tristanayres: are you actually running the game or playing in it, or is this just for discussion? If you're playing in it, does your DM have a definition of BFC for this dungeon? If you're running it, do you have a definition? If that's defined, it makes creating an optimal party a lot easier.