Healing turrets? I would burry this idea. There will always be situations where turrets heal the wrong team mate no matter how they change their AI.
Changing them into something like harmony orb could work. So they follow their target and heal it 24/7. However, this would basically be old Zen but with 3 destroyable orbs on a high cooldown.
And I don’t like raw healing on her. I think her healing should be more like a side effect of a different support ability like photon shields.
Healing beam or healing orbs are like the worst ideas possible. They are too inconsistent, they change her gameplay too much and turn her into a main healer.