How many heroics have you cleared though? Azjol'nerub, Violet Hold, Halls of Lightning, Stratholme, etc are quite a bit more difficult than UK, Gundrak, and Drak'tharon imo and really start showing off the power of a resto shaman. I couldn't really imagine doing Violet Hold w/o a resto, he just spam chain heals on the shadow boss for example while my other guys race to DPS.