SCH needs some nerfs

[KDSilver]

Even if you removed Critlo today, it wouldn't make Noct.Ast better because of its lack of sustained heal.
CU could somehow mimic Whispering Dawn, but it's on a 90s CD.
Eathly Star is somehow a response to this as well as Indom, but it's on a 60s CD and need people to be inside of it (with a limited range).
If Noct.Ast mitigation was something else than Aspected benefic/helios, the bole and the lady being reliable card for sustained heal and mitigation, it would be a good step in the right direction.
But any change to Ast mean Diurnal will also get it, which hurts WHM.
Both sect should have their own effects

If anything, about your suggestion, I won't say it's bad, but not good either, I don't know how it would actually play and how efficient it would be.
At least, since they fixed mana cost and Aetherflow trait, you could safely return succor potency to 150/150, indom to 400 and Emergency tactics at 30s.
It wouldn't hurt too much.