A good dps facing a good healer and using all their abilities to try and stop healing when both are equally geared, should result in the dps wins after a few mins. 2+ of the same quality dps on a single healer should mean dead healer no matter what that healer does. There should be no need to coordinate CC and whatnot as if it were a lvl 82 elite (which are easier to solo than a healer) or some form of boss. In a numbers game where 1 = 1 = 1, 1+1>1, and shouldn't require anymore than that. ESPECIALLY, when the healer is not putting in any more effort than the DPS.