Armor penetration vs Flat attack damage runes
I have always used Armor penetration while a lot of other people use flat attack damage runes.
I have actually no idea which one is better by statistics, so lets calculate!
Data lvl 1
Average amount of base AD for an AD carry at lvl 1 = 55
Amount of AD gain from masteries: 3 + 0,58/level = 3,58 AD at lvl 1
AD runes grant: 0,95 AD each mark and 2,25 each quint
Armor penetration runes grant: 1,28 ArP each mark and 2,56 ArP per quint
The minimum AD at the start will be 55 + 3,58 = 58,58 AD
Comparison lvl 1
Full flat AD
The one with full attack damage marks has the following amount of attack damage at the start:
58,58 + 0,95*9 + 2,25*3 = 73,88 = 74 attack damage.
Let's say the enemy has an average of 19 armor, 19 armor blocks 16% of the physical damage income.
Though, we have masteries, that also ignore 6 + 8% of the armor.
So 19 * (1-0,08) = 19 * 0,92 = 17,48
17,48 - 6 = 11,48
11,48 armor blocks 10% of the damage income
So each attack you will do 74 * 0,897 = 66,4 = 66 damage at lv…
I have actually no idea which one is better by statistics, so lets calculate!
Data lvl 1
Average amount of base AD for an AD carry at lvl 1 = 55
Amount of AD gain from masteries: 3 + 0,58/level = 3,58 AD at lvl 1
AD runes grant: 0,95 AD each mark and 2,25 each quint
Armor penetration runes grant: 1,28 ArP each mark and 2,56 ArP per quint
The minimum AD at the start will be 55 + 3,58 = 58,58 AD
Comparison lvl 1
Full flat AD
The one with full attack damage marks has the following amount of attack damage at the start:
58,58 + 0,95*9 + 2,25*3 = 73,88 = 74 attack damage.
Let's say the enemy has an average of 19 armor, 19 armor blocks 16% of the physical damage income.
Though, we have masteries, that also ignore 6 + 8% of the armor.
So 19 * (1-0,08) = 19 * 0,92 = 17,48
17,48 - 6 = 11,48
11,48 armor blocks 10% of the damage income
So each attack you will do 74 * 0,897 = 66,4 = 66 damage at lv…