User blog comment:NicknameMy/My Garen buff, what and why?/@comment-4900160-20120330110348/@comment-4900160-20120330170602

I have 25 ArPen runes + 6 flat ArPen masteries + Youmuu for a total of 51 flat armor pen. This is more than enough and better than last whisper in most situations. He can deal tremendous amounts of damage even late game, you just need CDR and tankyness. Surviving one spin is something. Surviving 3 is harder, even with lots of armor since stacking the latter does not work against his ulti, so once your over-armored target hits 30-35%% of his max hp, you kill them in one spell assuming you have taken the arcane knowledge mastery and the 21st in offense.

If you encounter these problems I assume you are playing full AD Garen which is not the best build late game. Atmogs and FoN make you tank forever, while Ionian boots, Youmuu's and IE make you deal tons of damage. This is not theory, this is my experience. It works because I say so.