I know you can set yourself as a PvP mentor, but why is there no way to achieve the Mentor status through PvP? For the Disciple of War/Magic mentor, you need to run Ifrit normal 1,000 times and get 300 player commendations along the way, and Disciple of Hand/Land you need to just follow a guide on leveling the class to 60 then get 300 collectables.
My point is neither of those really require that much socialization / helpfulness, so I don't understand why acquiring Mentorship through PvP isn't an option either.