Multiple locks isn't the best choice IMO. Sure, it's great dmg & all, but they don't scale significantly (imp shadow bolt is the only thing that comes to mind). Plus, they'll all share the same weakness--DoTs are dispellable, some classes/races/mobs have total immunity to fear, etc. I'd say multiple shadow priests, hunters, or (of course :-P) mages would be a far better choice. Or maybe multiple rogues, but good luck pulling that off. (Still...3x simultameous ambushes? GG :-P)