Armour is a rating that measures a character's physical damage mitigation.
Supposedly the most armour monsters have in the game is about 930 .
Damage reduction from armour only reduces physical damage taken. Elemental damage and damage-over-time are not affected.
The amount of damage reduction is a function of armour rating and the damage taken. Damage reduction is capped at 90%.
Damage Reduction = Armour / ( Armour + (12 * Damage) )
For example, if you have 1200 armour rating this chart indicates how much damage will be reduced by:
Net Damage = Raw Damage2 / (Raw Damage + Armour / 12) Defense Factor = Raw Damage / Net Damage = 1 + Armour / (12 * Raw Damage) = (1 + sqrt(1 + Armour / (Net Damage * 3))) / 2
Therefore we can conclude:
- If raw damage is much less than Armour / 12, raw damage has a near-quadratic effect on net damage. Equivalently, in this regime raw damage has a near-linear effect on net DPS if the raw DPS is held constant.
- If raw damage is much greater than Armour / 12, raw damage has a near-linear effect on net damage. Equivalently, in this regime raw damage has little effect on net DPS is the raw DPS is held constant.
- Against attacks of a fixed raw damage, armour has a linear effect on the number of attacks it takes to deplete a certain amount of hit points.
There are passive skill nodes that grant additional evasion or a combination of bonuses including evasion.
These passives increase armour rating by a percentage.
|Armour and Evasion||
|Leather and Steel|
|Armour and Energy Shield||
|Body and Soul|
These passives are related to armour, but don't fit into any other category.