I agree the healing is pretty simple, but having a solid tank makes a huge difference.  The Dragon attacked me right away also, and having a tank taunt him off was crucial to survival.  Facing the dragon away from group and moving out of fire made the run simple, but its amazing how something so basic is lost on a lot of people.  I too have not had to put on my healing gear, running with +450 Healing and doing ok i think.  We did try the instance in the Zar....what ever it is, the one you swim too, and needed all healing gear, and was still not enough.  But thats the fun, trying to figure out the bosses, and what to do.