User blog comment:Berryeater/Let's Talk about Rengar - The Pridestalker/@comment-27802145-20160614041017/@comment-28465461-20160616021255

@Nazareadain

Its not that I have undervalued penetration. Flat is good for early game dominance, low armor targets and snowballing, however it might not be a good idea to use this if behind, plus if you are going up against tanks, then you might want to run % penetration instead of flat.

I tend to disagree with your opinion on battering blows being worse than precision. As the penetration you want to run against tanks that build a lot of armor, its more effective against people who build beyond 125 armor if I am not mistaken. Which would be ignoring 8.75 bonus armor while precision ignores 7.2 armor regardless. In that case against other people that did not invest in armor, yes it will work against them. However, with rengar's damage output makes it a bit unnecessary at times, other times you need to take out your low armor target fast as they prove to be a threat as it is neccessary.

I can definitely agree with you on the rest.