Please adjust class mastery gains from status spells.
Silence, somnolence, veil etc all give 2 class xp while dark burst gives 16xp. On a per turn basis this is really punishing as dark mages are now disincentivised heavily from leaning into crowd control and incentivised to go for pure damage spells. When trying to max out end game classes, the progress grinds to a halt.
Also please consider giving less tanky classes a very minor boost. Overlord, paladin etc will naturally see more combat and therefore naturally max out their class progress much faster than back-line supporting units.