Originally Posted by Dayve
Those numbers I gave were obtained using the armor reduction formula as posted by Swiftwind. Just plug in the armor values before and after a given armor reduction and compare the results. The complete formula for calculating such a damage increase is:
% increase = 100 * ( (1 - armor_after/(armor_after + 10558)) / (1 - armor_before/(armor_before + 10558)) - 1)
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I just wanted to make sure I understand the math behind calculation % increase due to ArP real quick. The below is NOT a definite, but rather me trying to understand the mechanics behind it all.
The previously posted equation here (derived from the known armor reduction % equations) is quoted above. My first question is: the armor reduction equation is labeled as applicable for post level 60 -- they haven't changed that, have they? Traditionally the equation was used to calculate @ level 70, but does it still apply for 80? The equation in question was: % reduction = armor / (armor + 10558), assuming a level 70 attacking.
Secondly, I'm trying to understand the new ArP Rating. Using Dayve's equation, I've "simplified" it to give:
% increase = ((armor_before + x)/(armor_after + x) - 1) * 100 = (armor_before - armor_after)/(armor_after + x))*100
where x = 467.5(level) - 22167.5, where @ level 80 = 15232.5
and armor_before = initial armor
and armor_after = final armor after ArP = (1 - ArP/(100*7*15.4)) * armor_before
The armor_after was based off: ArP = 1 ArP Rating, and roughly 15.4 ArP rating = 1% armor ignore.
Combining everything, and praying to god that I didn't drop a variable accidentally:
% increase = (armor_before*ArP)/(10780*armor_before - armor_before*ArP + 10780*x)
Testing to see if this makes sense, I decided to consider a boss with 7600 armor at lvl 80 and here are the values:
Anyway, since this is the first time I've ever really tried to grasp game/combat mechanics, can someone help advise if I'm approaching this consideration of ArP correctly?