Talk:Kayle/@comment-5606883-20130227094135/@comment-4881935-20130228054121

^ First off, the increase cost of magic resist and decrease cost of health changed itemization. The high cost efficiency of magic resist is a way bigger reason why people changed their defensive itemization.

And secondly, % reduction and % penetration always stacked multiplicatively (assuming you had no flat pen from runes and masteries). Unless ur stacking insane amount of magic pen, there isn't much of a change. It's most likely around 5% increase in damage.

And I'm nitpicking because the change in penetration doesn't make a huge difference. The item changes had way more affect then the change in reduction/penetration.