Cloak of Shadows def bonus question

[Zath]

Cloak of Shadows' defense bonus should be additive with Defiance or any other skill that modifies defense. It's interesting to note that this probably applies to those skills with a debuffing effect too, such as Conviction and Battle Cry. If a low AR Barbarian planned to tackle the Ancients with Battle Cry for example, he may be surprised to find his defense debuffs completely negated by Madawc's Shout since the two would be additive instead of multiplicative. The same principle would work in reverse of course, and a Conviction enchanted unique monster may not be as great a threat to high defense characters as most are lead to believed.

Edit: I base my opinion on the fact that all these defense modifying skills invoke the same skill_armor_percent function in skills.txt. When this occurs with other functions, it has always resulted in their effects stacking in an additive manner.