Quote Originally Posted by DixieBellOCE View Post
Just up the requirements to mentor so that only the best players can achieve it.

From there its easy to tell who the bad mentors are amongst a smaller number of players.
Even if you up the requirements, you are probably just going to get more people who bought their clears instead of your average mentor now. The amount of actually good players I've seen in NNs so far are vast minority to begin with.