The build can be played as full DPS, but it will lack damage compared to dualwield or twohanded, unless you have Maelstrom and Master Bows.
However, even as a healer this plays very much like an archer and somewhat like a bard. And a bow is arguably the best weapon choice for a stamina based healer. This hybrid playstyle gets complimented very much by a lot of Warden class skills and passives.
