The simple problem is that the shields have too much pure healing and the regens do not have the mitigation to compensate and the game rewards mitigation over healing

The only time healing is more useful is white hole mechanics and after kefka square seems scared of using white hole mechanics (to be fair since they can be influenced by crit healing they aren’t exactly my favourite)

Square needs to find a way to fix the fact that pure shield healing (as in functionally have no pure healing like noct AST) is god awful in dungeons and overpowered in raids, up until now the way they fixed this was to make shield healers regen healers by proxy (pnuema, critdom anyone) so you wouldn’t run into the “trying to dungeon heal with noct AST problem”

The shield healers need to be nerfed (as much as I hate it as a shield healer main), there is no reason why SCH/SGE should be the best/second best comp (depending on how well you can scale AST’s buffs) while WHM/AST is in the toilet, either they both need to be in the toilet or they both need to be roughly equally viable