ive run with most combinations now and from that....

prot pally
-- drood and warr not nearly as good for multi mob aggro which is king in pve instances...with fw and hp inc in patch that just gets moreso

priest

yeh yeh all healers aregood... priest is only one with grp heals which makes boxing a 5 man easier

3 mages

best lasting easiest to use cc (only human) but only need to use 2 macroes to use it... /assist tank /focus and /poly focus


This in my opinion is the easiest to use and most effective 5 man grp. Im not saying other combo dont work (and Ive tried everything I can think of), but for ease of use and effectiveness this is king.