Anybody see a problem with allowing Charisma as the modifier that effects will instead of Wisdom as a feat? I'm not entirely sure how this could be abuse-able, but I figure somebody here might see something I'm missing.
To be clear, I'm not asking about all of Derro Madness, just the use of Charisma for Will. :)
It's abusable - everything is abusable. Though in the grand scheme of things, it wouldn't be a bad feat. It would be a very potent one though, so you may want to give it a prerequisite.