I'm not feeling this "mentor" situation at all... For one thing, Allen isn't the type to need a mentor... Secondly, their personalities may not be conducive to that
type of arrangement. If Derek turns out to be effective, Josh may not like it one bit... Even if Derek is mediocre, Josh may not appreciate the threat he poses.
I like Anderson, but bringing him in with "mentoring" expectations doesn't seem well thought-out. -Or necessary.