I'm wondering -- do ghul-mages have more stats than what's given? Also, do we want to do great ghuls as monsters and ghul-mages as a template for them?
Ok, jann are Str 16, Dex 15, Con 12, Int 14, Wis 15, Cha 13. Change Con to - clearly, but what do we want to do with the rest of the abilities? Nothing really seems to speak to any particular changes.