Allocate your bonus point between Mind & Piety.

I am main WHM, and I didn't dump all my points on Mind. Due to latency (Getting invisible damage) I added also some Vitality (and Still have them).

I'd say 50%-50% for Mind & Piety for now, and don't worry about the allocation. GC sells a Hymn that will reset the point so you can adjust them if you bought one.

At Lv.37 you'll get the real deal healers' Accessories, Try to get PINK Accs (Green gems accs add Piety , Blue gems accs add Mind).