Rift Armor Math Guide by Talamare
Now first things first – Armor does NOT have diminishing returns. 1000 more Armor is equally effective if you have 10 Armor or if you have 10,000 Armor
Yes it is true that the “%” of physical damage reduction you see will be less as stack more and more armor, however that number is misleading!
A Discovery I made – The X value of Armor at level 50 is 6500!
What this means is that to calculate how much % damage reduction your armor is providing you need to use the following equation
Armor / (Armor + 6500) = Physical Damage reduction
(It also means that you need 6500 Armor to have 50% physical damage reduction)
This also affects how much Armor you need to gain 1% more effective health
It means that 65 Armor = 1% more effective health
Perceived Diminishing Return
with 1000 Armor you have 13.3% Damage Reduction
increase that by 1300 gives you 26.1% Damage Reduction
Makes you think – ZOMG 13% difference!!1!
but lets factor your 4000 health into it then
4000 / 0.867 = 4613
4000 / 0.739 = 5413
5413 – 4613 = 800
now someone with a high 15,000!!! armor has 69.7% Damage Reduction
increase that by 1300 gives you 71.4% Damage Reduction
Makes you think – WTF only 1% difference!??!1?!
but lets factor your same 4000 health into it (wow someone with 15000 armor and only 4k hp? get some endurance noob)
4000 / 0.3023255813953488* = 13230
4000 / 0.2850877192982456* = 14030
14030-13230 = 800
* Rounding decimals screwed over the numbers, so I used full decimals
Anything I missed from Armor?