I've gotten some better gear and the gear score is up over 4k now... Really easy. I'm flipping back and forth between flash heal and Prayer of Healing in terms of mitigating damage when it comes in, but feels like I have lots of tools now. I don't think I will get the gear necessary to try ICC (I think we are doing 10 man Uld hard modes for fun this week - so I might sneak my priest in there) before Cata hits, so will really just have to wait until 85.