Armor Tough AP Effective damage reduction
official rule * houserule A ** houserule B ***
0 1 0 1 1 1
1 1 1 1
2 1 0 0
3+ 0 0 0
1 1 0 2 2 2
1 1 1 2
2 1 1 1
3+ 0 0 0
0 2 0 2 2 2
1 2 2 2
2 2 1 1
3 0 1 1
4+ 0 0 0
2 1 0 3 3 3
1 2 2 3
2 1 1 2
3 1 1 1
4+ 0 0 0
1 2 0 3 3 3
1 2 2 3
2 2 2 2
3 0 1 2
4 0 1 1
5+ 0 0 0
2 2 0 4 4 4
1 3 3 4
2 2 2 3
3 2 2 3
4 0 1 2
5 0 1 1
6+ 0 0 0
3 1 0 4 4 4
1 3 3 4
2 2 2 3
3 2 2 3
4 1 1 1
5+ 0 0 0
3 2 0 5 5 5
1 4 4 5
2 3 3 4
3 2 2 4
4 2 2 3
5 2 1 2
6 0 1 2
7+ 0 0 0
* with the experimental rule "Excessive force" for AP3+ weapons
** AP works against Tough and Very Tough, but each level of Tough need 2 points of AP to be negated
*** same as previous, but you must negate Tough before normal armor point