Quote:

**Talking Socks**:

I'm failing to understand the point the TC is making.

Let's assume the following.

-You buy last whisper

-You buy brutalizer

-You get EITHER armor pen runes OR crit chance runes

-You do not have any base crit or armor pen other than your items or runes

-Target has 75 armor

AP runes penetrate 29 armor

Brutalizer penetrates 15

Last whisper penetrates 40%

Crit chance runes increase chance by 12%

With armor pen runes, the damage increase will be :

(75 - 29 - 15)*0.6 = 18.6 armor after penetration, that's a damage bonus of 175/118.6 = 47.55%

With crit chance runes, bonus damage will be :

(75 - 15)*0.6 = 36 armor after penetration, that's a damage bonus of 175/136 = 28.68%

Then, because there's a 12% crit chance damage bonus will be 1.2868 * 1.12 = 44.12%

So armor penetration will provide slightly more damage.

Now what if they have 45 armor? In that case last whisper isn't needed on the armor pen build so I won't count it.

(45 - 29 - 15) = 1 armor, that's a 145/101 = 43.56% boost for armor pen

(45 - 15) = 30 armor, that's a 145/130 = 11.54% bonus, with crit chance this becomes 24.92%

So armor penetration is significantly better.

Our numbers are so much different...

Why are you dividing 175 into the result, isn't that using the base armor in the end result when it's no longer the base? I'm failing to see why, although it's probably obvious to someone who knows math past the 3rd grade level, which I don't

.

It makes no sense because with your math it's showing that armor penetration is so much better that it's a no brainer decision and picking critical strike is a huge mistake in any situation.

Btw with your method the hybrid red crit / penetrate quints route ends up being better than both.

(75 - 17 - 15)*0.6 = ~26 armor after penetration, that's a damage bonus of 175/126 = 38.9%

Then, because there's an 8.4% crit chance damage bonus will be 1.3888 * 1.084 = 50.6%

vs. 45 armor

(45 - 17 - 15)*0.6 = ~8 armor after penetration, that's a damage bonus of 34.3%

Then, because there's an 8.4% crit chance damage bonus will be 1.343 * 1.084 = 45.5%