Talk:Armor/@comment-28013897-20160724025605/@comment-5482772-20161017132210

Got X HP and would get Y HP? X/Y=Z

Got A Res and would get B Res? A/B=C

If Z>C go resistances (estimate it, dont try to be too precise, you dont calculate in health regen, or other damage kinds).

Thats about as simple as you can make it. This just gets complicated. However: If your opponent got Black Cleaver and/or last whisper (especially on a carry) bonus armor value gets reduced so hard HP value is 50-100% more efficient. Flat armor penetration however makes armor way more valuable because the first points of armor are the most efficient (for maxing out effective health).