I'll add my two cents here. As a tank I prefer that my healer/healers focus on only one thing, healing. That is the role they chose, not dps. If that means they stand around doing nothing for a bit so be it, just means they will be ready to throw out a heal when needed. Their role doesn't require them to dps. Usually healers are given dps abilities to enable them to solo and do quests not to add to overall dungeon or raid dps. To demand that a healer also dps is a bit elitist. If a healer wants to dps and can do so without wiping the party than cool, if not, no biggie. Elitism is part of what makes a gaming community toxic.