Looking for some help with a healer

sheen

I'm having quite a bit of trouble when deciding with this build. I feel like though its missing something, and would be interested in the communities interpretation of it. I do feel like I don't need a real attack, since most of the time I'm either healing or setting up bionic shields, and whenever they're added they feel like dead space. But any criticism is gladly accepted o/

(Unnamed Build) - Freeform (Support)
v3.43:35

Super Stats
Level 6: Presence (Primary)
Level 10: Intelligence (Secondary)
Level 15: Constitution (Secondary)

Talents
Level 1: The Witch (Con: 10, Int: 8, Pre: 10, Rec: 10)
Level 6: Diplomatic (Int: 5, Pre: 5)
Level 9: Lasting Impression (Pre: 5, Rec: 5)
Level 12: Negotiator (Int: 5, Rec: 5)
Level 15: Quick Recovery (Con: 5, Rec: 5)
Level 18: Shrug It Off (Con: 5, Pre: 5)
Level 21: Healthy Mind (Con: 5, Int: 5)

Powers
Level 1: Eldritch Bolts
Level 1: Conjuring
Level 6: Compassion
Level 8: Antagonize
Level 11: Bionic Shielding (Rank 2, Rank 3)
Level 14: Will-o'-the-Wisp (Guide, Ghost Fire)
Level 17: Death's Embrace (Rank 2, Pact)
Level 20: Iniquity (Rank 2, Rank 3)
Level 23: Conviction (Rank 2, Reverence)
Level 26: Ascension (Judgment)
Level 29: Fiery Embrace
Level 32: Mindful Reinforcement (Rank 2, Rank 3)
Level 35: Aura of Primal Majesty (Rank 2, Rank 3)
Level 38: Arcane Vitality (Rank 2, Rank 3)
Adv. Points: 36/36

Travel Powers
Level 6: Prism Athletics (Rank 2, Rank 3)
Level 35:

Specializations
Presence: Repurpose (3/3)
Presence: Selfless Ally (2/2)
Presence: Moment of Glory (3/3)
Presence: Force of Will (2/2)
Sentinel: Eternal Spring (1/2)
Sentinel: Caregiver (3/3)
Sentinel: Sentinel Aura (3/3)
Sentinel: Moment of Need (3/3)
Sentry: Fortified Gear (3/3)
Sentry: Precise (3/3)
Sentry: Sentry Aura (3/3)
Sentry: Fortify (1/2)
Mastery: Sentinel Mastery (1/1)