Hey to each his own. You can see here that no matter what Lina does, there will always be people who are unsatisfied. She might as well do her own thing and do the content that fits her style and inspires her the most.
And for the level drain thing, it might be possible to make it so you're only weakened when fighting that specific mistress. Like there's a proximity spell, or the MC just loses all his composure when he's in the presence of that specific mistress that drained him. So, it's like a psychological level drain. That could be cool