Talk:Riven/@comment-155.69.203.1-20120106053905/@comment-68.8.222.209-20120107085405

Let's take Renekton as an enemy for an example. At level 3 (when you both have all 3 skills) he will have 690 base HP, and 40 armor with armor yellows. this gives him 690 * 1.4 = 966 effective HP vs physical. The 15 armor pen from reds alone cuts this to 690 * 1.25 = 862.5 effective HP. This cuts his health by 103.5, so unless you're doing a full broken wings and ki burst 4 times: +21 * 4 and 9 * 4, 84 + 36 = 120 which is about the point it exceeds armor pen effectiveness, armor pen is always going to be better. With reds and quints you get him down to 793.5 effective HP, so the armor pen is better or at least even at early levels and way worse late game. If you're gonna get attack damage runes, go for quints, you retain 5 more armor penetration and still have +7 damage.