| Plausible Pseudonym |
I recall a developer comment after Occult Adventures came out that Pain was originally bouncing between being Wisdom and Charisma based, and this was probably an editing error after they finally settled on Charisma. I'll never be able to find it, though. You can try some creative googling and hope to get lucky.
A PiTA GM may not be convinced, but you can point out that there is literally no other discipline ability that works this way, so common sense suggests it's an error.