I still have a team , lead shadow priest, 4 aff locks. this combo is geat for pvp. this grp was lvled on a pvp server to 70. (when cap was 70) have not played them much since then but they could do any 5 man (non-heroic) instance, dailies, pvp, etc no problems. Priest is needed for buffes, now with dual spec you could have a field day. Shadow dps and 4 locks are a power house for damage, burst , DOT.s etc. do it you will not be sorry. I also did another grp with driud and 4 locks , gives good buffs and tank (Heroic duty) 3 locks geared and anything are great.