Anything that increases Criticals will help your healing, as you can have a Critical Heal.
Your stats are OK, although you may find you can reduce the regen because the heavy attacks with a healing staff restore magic. But, other wise you seem to be OK. The biggest issue is, can you maintain heals and resources in a Boss Fight in a Group Dungeon, particularly a Vet Dungeon Boss that takes longer to beat? If your magic pool is depeleted, it does not matter how high your spell or healing is, your at 0 HPS (Heals per Second)