Ghostcrawler on the mechanics behind Armor Penetration

Reader Comments (Page 1 of 1)

4-19-2009 @ 9:16PM

Dch48 said...

You can never ignore all of a target's armor. That's the reason why the calculation is done the way it is. All LK bosses have 13083 armor and the max or cap that can be ignored works out to 9906. Say you have 30% ArP rating. That would make you ignore 30% of the 9906 or 2972. Take that number from 13083 and you have 10111 for the boss's armor. A reduction of 22.7%, not the 30% given in the tooltip. 13083 armor provides 44% damage mitigation. The reduced number of 10111 works out to 37.8% mitigation. Therefore you will do 6.2% more damage with your physical attacks which is not bad.

In my case, when my Grim Toll trinket procs I have 728 ArP or 59.2%. Working out all the formulas gives me 13.8% more physical damage for the duration of the proc. That's pretty substantial.

ArP is definitely not the useless stat some people think it is.

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