It can work but we need to be realistic and go in thinking that one of them will have to play elsewhere on the ground. We know Bruce and Naughton can play down back if required, but I'm not convinced on Schache. I've toyed with the idea of him on a wing, but not sure that having him there wouldn't badly expose us defensively.
It's pretty weird that having too many options could force us into demanding more versatility from our players (almost like someone is doing it on purpose).