Sunday, December 2, 2007

What’s This "Ignore Armor" Stuff

So we got our War-Feathered Loop and immediately the BRK Email and Christmas-Catalog Black Hole was overflowing with questions about how the Ignore Armor feature affects DPS. As usual, the answer is:

It depends.

To start with, the formulas that govern damage mitigation are not linear; they are partially based upon your target’s level. If your enemy is between the levels 1-59, their armor-mitigation is calculated with this formula:

%Reduction = ( Armor / ( ( Armor + 400 ) + ( 85 * Enemy_Level ) ) ) * 100

And if your enemy is 60-73 - remember that heroic bosses are assumed to be level 72 and raid bosses are assumed to be level 73 for mathematical purposes - the damage-mitigation formula is this:

%Reduction = ( Armor / ( ( Armor - 22167.5 ) + ( 467.5 * Enemy_Level ) ) ) * 100

Now then, let’s pretend you’re fighting a level-70 BRK and he has 6142 armor. How much physical damage is he mitigating?

%Reduction = ( Armor / ( ( Armor - 22167.5 ) + ( 467.5 * Enemy_Level ) ) ) * 100

%Reduction = ( 6142 / ( ( 6142 - 22167.5 ) + ( 467.5 * 70 ) ) ) * 100

%Reduction = ( 6142 / ( -16025.5 + 32725 ) * 100

%Reduction = ( 6142 / 16699.5 ) * 100

%Reduction = 0.3678 * 100 = 36.78% and if you check our armory profile and the armor tooltip, you’ll see that these figures match.


Image: Daniel Howell


Now you buy your new belt with the “ignores 70 of your opponent’s armor” capability. How does this affect BRK? When you attack him, it reduces his armor by 70 and thus decreases how much physical damage he mitigates.

%Reduction = ( ( Armor - 70 ) / ( ( ( Armor - 70 ) - 22167.5 ) + ( 467.5 * Enemy_Level ) ) ) * 100

%Reduction = ( ( 6142 - 70 ) / ( ( ( 6142 - 70 ) - 22167.5 ) + ( 467.5 * 70 ) ) ) * 100

%Reduction = ( 6072 / ( -16095.5 + 32725 ) * 100

%Reduction = ( 6072 / 16629.5 ) * 100

%Reduction = 0.3651 * 100 = 36.51%

You’ve just reduced the amount of physical damage mitigated by armor from 36.78% to 36.51%. Congratulations!

Now let’s switch your target to Aetherial Circle’s main druid tank, Kelektra.


Image: Daniel Howell


Fully raid buffed, she has 27,801 armor and mitigates 72.48% of all physical damage. What does your little belt do against her?

%Reduction = ( ( Armor - 70 ) / ( ( ( Armor - 70 ) - 22167.5 ) + ( 467.5 * Enemy_Level ) ) ) * 100

%Reduction = ( ( 27,801 - 70 ) / ( ( 27,801 - 70 ) - 22167.5 ) + ( 467.5 * 70 ) ) ) * 100

%Reduction = ( 27731 / ( 27731 - 22167.5 + 32725 ) ) * 100

%Reduction = ( 27731 / 38288.5 ) * 100

%Reduction = 0.7243 * 100 = 72.43%

You have now decreased the amount of physical damage Kel mitigates from 72.48% to 72.43%… Congratulations? Kinda.

How much DPS does Ignore Armor provide? As you can see, it completely depends upon the armor and level of the mob you’re fighting.


Disclaimer: This content was originally posted by Daniel Howell (BigRedKitty) on bigredkitty.net. It is posted here for historical and archival purposes only.

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