Monster EXP

Level Difference	EXP Yield
+16>	0.4
15	1.15
14	1.2
13	1.25
12	1.3
11	1.35
10	1.4 (Most Optimal)
9	1.35
8	1.3
7	1.25
6	1.2
5	1.15
4	1.1
3	1.05
2	1
1	1
Equal	1
-1 ~ -5	1
-6 ~ -10	0.95
-11 ~ -15	0.9
-16 ~ -20	0.85
-21 ~ -25	0.6
-26 ~ -30	0.35
-31<	0.1 (Least Optimal)