Nope not even close. You'll always bring a WHM over both SCH and RDM for two reasons, first being yellow light procs (seal / +2 items), second being Hexa during Blunt for blue procs. The only situation you'd bring a SCH over a WHM is if you already had the pops and only planned on doing two Apademaks / Azdaja, then and only then would Embrava actually mean anything. Otherwise your already overpowered for everything else.And I don't think it is just Abyssea where Scholars are overshadowing Red Mages and White Mages.
Abyssea is about procs pure and simple. Anyone with a half decent brain can easily kill any NM except maybe Azdaja / Apadamek due to their rather unique set of TP moves. And for those two you can easily brew them should things get messy.
Now outside of abyseea, you bring SCH for embrava on super zerg fights inside Legion / Provenance, but we're talking about Abyssea here.