i got it how to fix AST!!!!

[Reivur]

You don't make a job more desirable by invalidating another. The goal should be the ability to take WHM/AST or SCH/AST without feeling like you should have gone WHM/SCH.

I'm actually curious how you find the rolling AoE that lasts significantly longer than a pre-built shield stack "invalidation". Shield Buffering brings value in two ways; sneaking past vitality checks by buffering people's max hp beyond a raid or tank buster, and... Well actually that's pretty much it. Scholar has pretty great mana generation/tools to work with themselves. Ast's was improved, but bottom line on this has always been that beyond shields not synergizing with Time Dilation or Celestial Opposition you run into the problem where shield buffering is significantly less efficient than Diurnal's regen by a mile-- even factoring in that you get 5% more healing potency in Nocturnal.

Are you going to claim that shredding having a healer who tries to double up on shields is going to somehow magically be efficient in raids with costs the way they are? Sure, there's an obligatory Bard or Machinist somewhere to help patch up the mp, but that's just hurting your raid's damage output (Another current complaint about the healers as well, by the way) to substitute for its sustainability. And even then anything that pulses damage regularly will be a bigger strain. And anytime a fight is spread out? Medica II's range and HoT is a godsend. And don't forget you outright lose the Mind buff in this combination. There are legitimate trade-offs here, not invalidation. By the logic presented here apparently Whm/Ast can't work because they're invalidated by Scholars-- because I'm not seeing the few Asts who do this content in Nocturnal as it is.