Psion
Adventurer
S'mon said:You can apply a Lich template to a 6th level Wizard, and cut the DR if you like.
A 6th level lich would not be a lich in feel to me. A lich wields "phenomenal arcane power."
So yeah, I can file off the corners of a square peg to fit it through a round hole, but it's not gonna be a square peg anymore.