It's not even WAR. Any good tank barely needs healing in Troia.
As a Sage my favorite Expert runs are 1 healer and 3 dps. You can still wall pull and do quite a good bit of dps with no tank at all, but at least you need to press heal buttons. Other fun games are when our dps like to see if they can keep full uptime on the DoT from the wall on the last boss, or stacking 4 spread markers together. Needless to say, Troia is a joke.