Thought of two already today… what about you?
Just make Sym one give her back her old E barrier let her stop its flight so she can defend one area.
Reduce her turrets damage buff their slow and hp so they are almost 100% utility.
Give her a passive shield generation aura that creates a buffer of hp on all allies within range allowing your healers to have more breathing room.
I dunno but their personal sustain should be 100% self sufficient…