I currently play Dk Resto Shaman and I cannot stand coming up against priests and druids.
Priest - tries to nuke you for a bit if that fails they resort to Mana burning you and winning the fight that way.
Druid - never go oom impossible to keep still and have a nothing much that I can interrupt.
So what do you find most annoying in arena? how would you counter these healers? please give me advice toooo =]