I suggest to remove the 4000 exp Cap or just make it x2 or x10 exp gain because at higher level 4k experience is useless since you need around 10 mill exp for each level and max level is 9,999 so bask basically in original game each boss give 1.5 million exp while in your mod the exp limit is 4000 which is pretty low and useless and will make you never reach end game