This is probably a bad idea. Especially to do it magic-casters only. Still, may as well, since it's not like I have anything better to do for now.
If this means not using the Blood Swords (or whatever it's called), then yes, it is a horrible idea.
On the bright side, there's sexy instant-death magic that works even on bosses (except for, like, the final one, but that's only because of his supermassive magic defense - there's a way around it).