Hello guys. Today I will be talking about a very confusing subject for many. Path of Exile has two main types of damage modifiers that each affect damage in a different way.
Additive Modifier Mechanics
Additive damage modifiers are known in-game as “reduced” and “increased” damage. The best way to think about additive damage modifiers is to picture them as a layer. They are the top “layer” of multipliers onto your base spell and weapon damage because they are the first to be multiplied by base spell and weapon damage. Also, all other damage modifiers are applied afterwards. The only exception to this rule are the local damage modifiers found on weapons. These additive modifiers are the easiest to stack because they are widespread in skill gems, items, and the Path of Exile passive tree. This is because each 1% of an additive modifier affects your damage the least due to being stacked first.
Multiplicative Modifier Mechanics
Multiplicative damage modifiers are known in-game as “less” and “more” damage. This is a highly coveted damage multiplier because it is added after all other damage multipliers. This means, per 1%, it has the greatest impact on your total damage because it is multiplied last.
Build 1: Base 100 damage. 100% increased damage. 0% more damage.
[(100 x 2.00) x 1] = 200 damage
Build 2: Base 100 damage. 70% increased damage. 30% more damage.
[(100 x 1.70) x 1.3] = 221 damage
Build 3: Base 100 damage. 50% increased damage. 50% more damage.
[(100 x 1.5) x 1.5] = 225 damage
As you can see, the more “more” damage you get, the higher your damage becomes. If you get more “more” damage than “increased” damage you will have less damage overall but that never occurs in Path of Exile. The reason for this being that “increased” damage is much easier to acquire.