Another example, I made a level 11 Cleric Charger that can one-shot a Hecatoncheires (the hardiest printed first party monster) with no loops, no Consumptive Field. Instead it uses the Southern Magician and Anyspells to persist Arcane spells. And the character is immune to damage and can do that more or less all day long. Persistent Spell just completely annihilates any sanity buff stacking has since suddenly your only restriction is having the spell available and it either being innately persistable or you turning it persistable (Reach Spell/Ocular Spell). Even without Reach/Ocular though, just buffstacking yourself to high heavens is absolutely insane numerically compared to any non-full caster.