Scholar
Often 10 second duration for Adloquium ends up being an MP deficit, because the shield effect runs out rather than gets broken. Increasing the duration or making the shield effect permanent would help out Scholar greatly.

Changing Biolysis "Reduces target's HP recovered by healing actions by 20%" effect to either not stack with, or alternatively overwrites, Dark Knight's Edge of Shadow debuff, and vice versa. Alternatively, replace the Biolysis effect with an entirely new effect altogether so that the stacking isn't an issue and allowing Scholar to contribute in some other way. Such as a pure DoT effect.