Me personally.. I'd Vortex/Nova bomb them, not a warlock? Aftershock/Fist of Havoc them ( From Above even, if you have too. With Helm of Inmost.) or.. If your neither of those. Then your screwed. Oh wait! That's right Hunters can blade dance them all, or golden gun their bubbles! Then you've made them respawn and split their team up. Now be good and kill them before they re group. Needless to say this sounds like a great, and fun strategy. So great that you thought it was an exploit. I think I'll try this soon. Have a good day!