I play a jedi sage toon, and I can crit heals at 5k every other heal. I have BM gear and war hero relics and implants. The problem is that when nobody bothers to help the healer, we just die within 4 seconds. I just don't bother moving and wait for the health bar to go down. (no point in cc or stun, or even lift )
I had better survivability pre 1.2. As of the case, when I play with a team who know how peel off attackers from healers, we usually win a game.
In PVE, jedi sage healers are amazing toons.
(I can heal, interrupt and dps - all the same time)