Gold and Gabriel are in. Gabriel will probably be following Castiel around like a puppy and will kill if he has to, but he's REALLY BAD AT IT.

Gold, however, needs his spinning wheel. COME ON PCS, COME GET BLUDGEONED TO DEATH BY AN OLD GUY... so long as Belle isn't watching. Or if she gets hurt/killed... oooh.

EDIT: Gabriel will be setting death traps instead of actually physically fighting once Castiel is dead.