Depends on what you want to do. I use something like this for PvP healing on my bard (who is a few levels lower than you): rift.zam.com/en/stc.html?t=0MTcp.i.VIb0i0szqz.xI
Riftstalker is taken for survivability (DO NOT put points in things like increase your Health/Endurance by X%. It's a waste of points)
Saboteur is taken for Adhesive Bomb and the Dex buff. Dex = Healing, so 15% Dex isn't a bad thing.