A 57: Off the top of my head, a Hellfire warlock is a good way to start, but it's only 3 levels. Other than that, the only ones I can think of are Eldritch ones (Complete Mag), but they're the equivalent to the Mystic Theurge in that you need either divine or arcane as well.
Q 58 How exactly does a monk's Ki Strike (lawful) work. Is it the same way an Axiomatic weapon does. Goes past DR/lawful and deals 2d6 to chaotic creatures? Are there actually creatures out there that have lawful as a DR? I know I can't think of any.