At SoTN and HoD, if you fight an enemy that's higher lv than you, you get up to X4 the value of his exp, but when you pass his lv, you get from 50% to 1% of his exp value, according to how much greater is your lv difference from his lv, something that in early lvs is good, but later frustrating, since it's making it impossible by normal means to reach the max lv. Something that i dislike.