I use 4 locks and a priest (used to be shadow until they destroyed shadow healing, now disc). I use 1/2 voids (depending on if one might die or if I just want to be safe) 1/2 succubus (auto-CC is really nice) and one your choice (recently imp, but up to you). I send in pets, usually at 2 different mobs (void/suc go to mob1 and void/suc go to mob2). Then I send everyone at mob3 and destroy it, mob1 and mob2 usually stick to pets if you only use nice DOTs. I run affliction with soul leech, soul link and siphon life. Soulshatter can help with new spawned adds. One big thing that is almost always important, give the pets time to get aggro (5-10 secs). Use that time to get simple DOTs or spells done (renew, PW:S, SW:P, rejuve, curse of elements, corruption, etc).