User blog comment:Care Level/Itemization Holes/@comment-1245534-20130825005423/@comment-9593635-20130825145739

I mentioned, someplace in these comments, that I was thinking %Armor pen, rather than flat. Indeed, flat armor pen would be too good early on.

I also mentioned elsewhere that the numbers on vamp charm are a bit off; they should be more in line with, like you said, AD quints vs LS quints.