When I 10 boxed in BGs, I would have one PvP team and one PvE team. My PvE team would hold bunkers, kill bosses, and do the PvE stuff in AV, and my PvP team (shamans, druids) would assault stuff, aoe horde and make life difficult for them.

s 5 druids to run around a lot, and a pally / 3 lock / resto shaman group to hold towers and help defend while assaulting galv and such, and then tanking drek when it was time.