User blog comment:Shinaliss/Efficiency Plots of AD and AP vs Penetration/@comment-25401282-20140909085619/@comment-6000413-20140909123002

1) The StD ratio is the only quantity that is comparable to penetration in a 2D plot. Other quantities would require a 3D plot, that is much less readable. The StD is calculated as: APscaling/(total damage), where total damage is (base damage+AP*APscaling), so in total:

StD=APscaling/(base damage+AP*APscaling), and the same for AD.

2) I Could do that, but I would have to make it a 3D plot with the CURRENT AD/AP on the Z-axis, which would be less readable. Anyway, you can still use the current plots and consider to have 0 AD/AP and you would get the efficiency with base damage.

It's important to remark that these efficiencies depend on your scaling and TOTAL damage, not only scaling and base damage, so if you already have AP/AD or penetration you have to input that into the plots, reducing the effective defense and increasing the total damage when calculating your StD ratio.