I wonder if anyone who says "SCH+SCH is bad" has actually ever tried it in content that matters, like Coil.

Turn 1 is just double tank heals, double SCH is easily the best healing approach to this.
Turn 2 is tank heals with light forced AOE damage, SCH can more than handle it with its fairy alone.
Turn 4 is, again, mostly just tank heals, unless you hit emergency mode.
Turn 5 is a joke with dual-SCH, Infirmity makes sure of that.