Talk:Kayle/@comment-68.109.110.108-20120618062254/@comment-2124153-20120618200934

^ No, you obviously don't get it. Even if you had a 100% crit rate, you aren't getting a 10% damage boost to every hit. It only adds 10% to the crit damage, and crit is 200% normal. Your crit damage goes from 200% to 210%. This means that even at 100% crit, it's only a 5% damage increase. With Infinity Edge and 100% crit, it is only a 4% increase in damage. If you don't have 100% crit -- and hardly anyone does, especially Kayle -- those numbers get even smaller.

That's why I correct you. Most people haven't done the Lethality math, and think that deals more damage than it actually does. Lethality is kind of crappy.

About MPen, physical damage on minions and towers does the same thing to her physical damage statistics. Point is, MPen works on both Q and her teamfight splash, both of which are considerable amounts of magical damage. Spending 5 points to get the 10% penetration is perfectly fine, especially considering that the four points you spend on CDR to get there are probably a good idea regardless.