[Noxid]

A lot of cool stuff (such as Wraithguard + Bodyguard lowering damage by 90%, Fleur not being main class only, Cutthroat not having status infliction, Nachbeben hitting multiple times with Orkam Drehen, Expanding Ice blitzing an enemy multiple times, Bamboo Staff being able to be Conduiz'd/Dragon Remains'd, Turtle Shell being able to be mutated into Unarmored Torso, etc etc.) has been outright disabled before for the same reason and forced people to do worse than simply picking another class instead, those tipped the balance horribly for being way too good compared to the balanced standards we get from average things, so this shouldn't be an exception.

I don't want Reaver to be nerfed when the problem are tomes being usable with it.

A 90% damage reduction is not cool its broken. Fleur is still usable you just have to choose between the main class benefits of both classes. Cutthroat is still usable. I could go on but non of these are really comparable. Actually theres an idea. Could make lawbreaker main class only even. Just throwing it out there. Some of these examples you gave are the sort of thing im suggesting actually. Tweaks not removal.