I would go with toughness instead of agility since you won't be doing a hit. Get the Mare's Ring, and maybe get some of Zo's abilities for special fights (specifically Guidance.)Thinking of making a support build for dark diff here's what I got so far.
Stats - Willpower, Presence and Agility
Skills - At-Will(Heal/Great Heal), Recharge(Group Heal/Blessing, Shield of Light), Encounter(Spirit Veil), Ultimate(Revive/Inspiration)
Any changes needed and what gear is good for this?