I think I figured out how to do this. Say you're level 45, already master in learning and you decide to put one more level into it. You spend 8 skill points to raise learning to level 8. That should give you an additional 3 percent bonus on experience. But that's a bonus on the base experience. Since you're already master and IF you're fighting with a teacher and instructor then you already have a 21 percent bonus for learning mastery and 25 percent for the two NPCs for a total of 46.
If you earn 100 points in base experience you actually get 146 points with that bonus. The extra level in learning gives you another 3 points (3 percent of 100). Relatively speaking, you have an additional bonus of about 2 percent over what you were getting before.
I went and looked at the total experience numbers by level on Mandate Mania, calculated the additional experience you need to go from one level to another and by my calculations, that would give you (starting at level 45) one additional level when you reach level... 118. If you put 3 additional levels (8, 9 and 10) into it at level 45 (spending 27 skill points), you end up with an effective bonus of about 6 percent and you get an additional level about every 20 levels after that. Unless you're trying to maximize levels past the end of the game, I guess I'm not seeing that it's worth it.
