If you are a good mentor, you don't need a mentor badge to mentoring. Or you just want to brag to people that you are good at your job without playing for so long???

The requirements are measurable measures, there is no way for SE to measure how good you are at your job, clearing endgame stuff is no good measure either.

Just think that the "mentor" status is something like sayin "this is a relative active player so is possible he/she knows some useful stuff"

If you want to be an active mentor, open learing parties for raids/trials or just be ince and give advice to people in dungeons when they ae nice enough to learn

True sempais don't seek to be sempais just to be ones, your padawans will appreciate if you are a nice person.

I bet some so called "Mentors" will be awfull people. Chill out and just be nice.