You can hex the m2server, to change the amount of experience needed to gain a full level up.
So for example say you hex edit lvl 33-34 to that it only requires 1000exp to level up, if each mob gave 100 exp, you would get 10% per kill...
Theres a few guides floating around on how to hex edit the experience as well as several chinese tools, have a good look around you'll find summat
