I have found it very difficult to run more then one mellee at max effectivness, at one time ....

Still you do get a lot of synergy from multiple buffs, no doubt.

But with 25 I dont really see much need for 5percent more this or 10percent more that.

From other threads I guess that the basic minimum is Druid, Warlock, Shamans ... then branch out from there but I really don't know.