Just an idea but it might be interesting if your fairy heals more when you have more aetherflow stacks so that it makes you think more about when to use your AF abilities.
Personally Summon Seraph is fine as it is your pet transforming but Seraphism is crossing the line by transforming the Scholar themselves, if anything were put onto the Scholar body, I would rather have something looks like Full Metal Field than a low quality WHM cosplay robe with chicken wings.