I'm playing 4 disc priests and 1 dh vengeance. The most powerful toon is 856ilvl and has all the dps talents like schism, purge the wicked, solace, etc. It has an average of 174k dps on the dummy after inflicting 7M damage in "dps mode" (No tank shield and Radiance every 17s). In "normal mode", it drops to 143k. I only did heroic so far and the dps can go down to 70k if I need to move a lot like the final boss of the vault. Tank is a steady 180k. I'm going to upgrade the gear to try to achieve 865ilvl with obliterum and then will try mythics. I'm still new to multi boxing but I do feel that compos like 5 hunters or 5 tanks are more fun. Hope it helps!