User blog:Shinaliss/Efficiency Plots of AD and AP vs Penetration

Ok, I ran some calculations and created two usefully helpful tables of cost per damage efficiency of AP/AD and penetrations.

How to use them:

On the X-axis you find the defensive stat of your opponent. Here you have to consider the effective armor/MR AFTER the OTHER reductions you already have, in order to decide whether you should buy AP/AD or penetration.

On the Y-axis you find the scaling to current damage ratio. Remember to include all of the current damage to calculate the scaling-to-damage (StD) ratio. Exemple: I have 100+100%AP and I already have 15 AP. the ratio is 1/(100+1*15) =0.0087.

Find your right square, check the scale and if the scale says 1 or more buy AP/AD, if less than 1 buy penetration.

NB: I have considered Void Staff as the penetration item above 65 MR and LW as the penetration item above 200 Armor. These are roughly the points where scaling penetration becomes more cost+damage efficient than flat penetration.

I have to say that the gold-efficiency of the Brutalizer is surprising and looking at these plots I would advice it to any AD champion, even carries, maybe getting a ghostblade afterwards.

I am here to answer any question. I want to post this on the Cost-Efficiency page, but I wait for your comments before doing that.

Cheers,

Shinaliss