Talk:Youmuu's Ghostblade/@comment-12727893-20141003123810/@comment-5803007-20150427022515

I think the gold effeciency for items that build out of brutalizer are wonky; because brutalizer is the item that they derive the value of flat armor pen from, I think that it is severely undervalued by the calculations. 10 arpen only worth 120 gold? That means that 10 armor pen is worth less than 4 AD. Unless the target has more than 120 armor, then the 20 armor penetration on Youmuu's is worth more than 240g, because it adds more damage than the 8 AD you could get for that 240g. And that 300 armor assumes that you have a base of 50 AD, and no other AD items besides Youmuu's. Add another 80 AD from a BFS upgrade, and they need 320 armor. And so on. Armor pen has a multiplicative effect with AD; the more AD you have, the more AD the armor pen is worth. If the guy with the Youmuu's has 1-2 other damage items, and the defender hasn't been building straight armor, the arpen will be more valuable.