Astrologian here, also not 80 and never done any of the harder coordinated stuff. So from this what you will. I doubt anyone will read this but eh, here we go.

I'd like a reworking of how the AST heals entirely. Like instead of regen or shields how about combining them to make a new option?
Such as having an absorb, that is to say you put a shield for say 300 potency on a target and when that shield runs out it restores 150%
of the damage dealt.
Perhaps a reflect as an alternative? A shield that reflects a fixed amount of damage back thus preventing damage.

The way AST is now feels so bloody empty. Like it's borrowing the soul of WHT and SCH while losing its own.