Please don't join endgame content with a job you dont know how to play

[Ashkendor]

The shields are actually reliably stronger than the SCH's in my experience, that and the Aspected Benefic is instant-cast and far more potent than Diurnal's Aspected Benefic, and generates a shield equal to 130% of healing potency. Reliability vs hoping for a crit chance on your SCH. Though I do agree, double regen usually ends up in a silly amount of overhealing.

The dumb part is that AST can overwrite Adloquium + Deployment tactics with Aspected Helios, or can overwrite a critted shield with a non-crit shield, effectively cutting it by more than half. I'd just as soon have the AST in Diurnal if they're paired up with my SCH, but it's kinda whatever. If they insist on staying in Nocturnal, I typically just leave them to solo heal because there's no point in wasting mana on shields that will get overwritten when I could use it to DPS instead.