Your last post was very helpful. Seems like priest is better than shaman but from what you said maybe druid should be in the running? Maybe i should be asking about druid vs priest? This is because druid was mentioned as just as mobile in healing as the locks are in dps-ing. But the druid doesn't really have any aoe heals... very sad. What do you guys think? Priest or Druid. With good keybinding and good skill could you make up for the no aoe healing with a druid?

Druid doesn't get the lifebloom till much later in game. Druid will have rejuv but priest will have renew. Druid has regrowth but that is not instant and so not really mobile. Bonus of druid is can respec to be a tank too.