modifiers?
Krishnath,
Your stat modifiers are incorrect. A 10 has a modifier of 0, as does an 11. Then 12-13 is +1, 14-15 is +2, etc, like so:
1 - 4
2 - 4
3 - 3
4 - 3
5 - 3
6 - 2
7 - 2
8 - 1
9 - 1
10 +/- 0
11 +/- 0
12 + 1
13 + 1
14 + 2
15 + 2
16 + 3
17 + 3
18 + 4
19 + 4
20 + 5
21 + 5
22 + 6...