The point of Arts for enhancing, then? -interrupt lulz?
Nah, this is where you either step into better spell tiers or even giving RDM traits that outright improve status modifying efficacy for both enhancing and enfeebling. Gimme dem 15 minute 30% Hastes or 13/tic Refreshes and an 80% Slow II pre-Sab. If SCH wants their thing, make Adloquium not suck so much. Fine tuning WHM with a Barspell variant would be okay here, too, just to not make RDM/WHM the default for magic defense purposes. And yes, I'm lobbing out arbitrarily high numbers on purpose because, damnit, mah blood is reeeeeed.