I know it's been mentioned numerous times in the past, but nothing has ever come from it and I don't understand why so I'll bring it up again.
The player healing 'pod' experience needs bumped considerably to a level on par with typical cleric training pod. Around 60 I'd say. Right now, everyone pretty much sits by themselves doing the repetitive grind on simple mobs they can solo because nobody wants to cleric. And quite honestly why would a cleric ever cleric for anything other than a boss where they'll receive a chance for a drop. They get next to nothing when clericing a training trip or small bosses with valueless drops. Bump the player healing experience pod to the levels that a cleric could gain while training themselves, and instantly there will be a willingness to cleric training parties, small bosses that never get done, etc. etc.
Sure, someone could find a buddy to go get beat up in an arena and let them heal them safely, but nobody would do that (except for extremely low level training) when they could be out training traditionally for the same experience and gain gold/drops at the same time.
Encourage party training, exploration, and group fun in general. Increase the experience gained for healing players.