Talk:Kayle/@comment-68.109.110.108-20120618062254/@comment-2124153-20120618125032

It's worth investing in. Kayle does a lot of magic damage even when you build her AD, but it's hard to itemize for penetration/reduction. You will never build Sorc's, Guise, or a Void Staff, so you're limited to Malady (only works in on-hit builds), hybrid penetration runes, or hoping that someone builds an Abyssal.

The AD + crit masteries are basically worthless anyway, so if that's all you have to give up, it's a good trade. I personally don't run MPen, but it's not because I don't like it, it's because I run 15/15/0 and I need Vampirism for my build. I used to run dual ArPen/MPen on her.