It would be nice to have a repeatable Max MP Questline in the vain of the Max HP Questline. This would be for the sake of having a completionist goal or gaining MP to wash with if you didn't stack enough int in early levels.
+1 I think mages could gain a lesser amount of mana than the HP quest gives and be fine. I’m personally not concerned about how much mana each quest turn in would give, but being able to gain any amount over time would feel good!