For people who have run Malevolence:
how hard would it be to scale it up in level while retaining the core of the adventure?
I really like the idea of Malevolence, but my players are gonna be around level 7 or 8 after their current adventure, so I would have to put some work into it.
Maybe also be a bit more careful with some puzzles and investigation elements. Level 4 spells are where we start seeing problem solver spells, like Fly.