It's important to note that type modifiers against armor work in two ways here: they mitigate a percentage of the target's armor, and increase the damage dealt in the same way as a type modifier against the hitpoints would do. Practically speaking, this means that 부식 damage is only reduced by 25% of a target's whole Ferrite Armor and the base damage is increased by +75%.

Thus having the damage type with the highest appropriate bonus is far more important against armored than unarmored targets. The formula causes a massive difference between a medium and a large reduction: 75% reduction (¼ original armor) is essentially twice more than 50% reduction (½ original armor).

아머 타입 데미지계산 공식같은데

영알못이라 일일이 번역해보려는데 너무 힘들다

- dc official App