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Hero
Well, Ken answered the major question, it seems.
As far as the Multi-Ability Dependency... While you could certainly houserule it Cha or Int only, I just don't see that working for the class as written. It's hardly the only class that requires two decent stats, and is better off than some. (Try playing a paladin or monk with only two high scores.
) It just fits the nature of the class, IMO, better than Cha only or Int only.
All that said, if people do try playing it with just one or just the other, I'm interested--as always--in hearing how it goes. If it winds up making a bigger difference in play that my own experience suggests, I could change my mind. But for the moment, I just don't see two ability scores being that big a MAD issue.
As far as the Multi-Ability Dependency... While you could certainly houserule it Cha or Int only, I just don't see that working for the class as written. It's hardly the only class that requires two decent stats, and is better off than some. (Try playing a paladin or monk with only two high scores.

All that said, if people do try playing it with just one or just the other, I'm interested--as always--in hearing how it goes. If it winds up making a bigger difference in play that my own experience suggests, I could change my mind. But for the moment, I just don't see two ability scores being that big a MAD issue.