Well I noticed that too but, it seems you are also a hume. Humes have the naturally highest CHR, so that's probably why we're seeing the difference. I seriously doubt any of our abilities are based on CHR, Scholars don't exactly seem like the charismatic type.
I think the focus depends on your race, party role and subjob. But one would probably want to gear almost identically to a RDM. MP gear, INT gear, MND gear and any Elemental, Enfeebling and Dark Skill+ they can get. Divine, Healing and Enhancing are ok but significantly less useful, as things don't resist your healing or divine.