Quote:

**DedPheonix**:

Well reguarding the Last Whisper comment, I dont think the math would work like that, but it should still be very effective. It should be 6 flat armor pen, and what remains of the opponents remaining armor would have 40% reduction from last whisper, and 10% from Weapon Expertise. Not sure that you would actually get the full 50% either, because you dont get 55% from Void Staff (40% mag pen)+ Archaic Knowledge(15% mag pen), you get 49%.

The math goes like this:

- You have a percentile reduction.

- You remove that from 100%.

- Additional percentile reductions are reduced from the remaining percentile.

In other words, e.g. Archaic Knowledge + Voidstaff = 1*(1-0.4)*(1-0.15) = 1*0.6*0.85 = 0.51. Your final penetration is 1-That or 1-0.51 = 0.49 = 49%. Add the Dominion passive and you have 1*(1-0.4)*(1-0.15)*(1-0.05) = 0.4845 = 48.45%. Obviously, this being multiplication the order of terms doesn't matter; regardless of the percentiles, the answer remains the same. And yeah, the 1 in the start is irrelevant and you can leave it out; I was just trying to showcase that you start off 100% with it.

Last Whisper + New Mastery + Old Map Passive would be:

1-(1-0.4)*(1-0.15)*(1-0.10) = 0.592 or 59.2%.

Just as a proof of concept, two hypothetical instances of 40% penetration to the same stat would be 1-(1-0.4)*(1-0.4) = 64% (far cry from the additive 80%)

And the Dodge-mastery is

**massive**; the number of times you can catch someone with proc off a creep or escape due to dodge proc is just insane. 10% Movement Speed is a

**lot** (it's almost a friggin' free Zeal) and this'll make Dodge Yellows and Ninja Tabi

**way** worse. With Nimbleness, you win

**every** remotely close chase. Now there's little reason to run Dodge Yellows over Armor Yellows.

Ninja Tabi are still a super-efficient Armor item against auto attackers but they lose on of their key functions especially on mobility-dependent champions like Singed. And obviously, Udyr, Jax & Sivir are all sad. Of course, 90% of the playerbase doesn't even know the item can ever be bought on non-Jax champs in spite of it being superstrong and negating auto attack procs on non-autohits, such as Vayne outside her Q, Udyr Tiger Proc (YES YOU CAN DODGE IT DON'T RESPOND WITH "NO YOU CAN'T IT GOES THROUGH IT" PLEASE; Bear works through Dodge, not Tiger) and Kog in general so whatever. Only few players will notice this.