In multiplayer, experiment with having one player constantly run around with two charged PPs. Enemies can be tracked independently and disciplined teammates close by can efficiently kill shield-dropped enemies as the PP guy takes cover to move or recharge. This takes a team with excellent communication and clumpiness[staying together]. Try pairing the PP with grenades, the magnum, the BR and carbine (obviously), and the shotgun. The PP/Magnum combo is particularly underused. Though it's no secret to anyone, I think players are suspicious of their ability to get a headshot after a bolt. I say try it: the magnum's rapid firing will probably take care of that. Even getting a PP bolt on someone can often mean a teammate will get a subsequent kill even if you can't.