Like i said, Im testing things out, and so far i have rarely needed any dfensive items, and the reason im using magic pen is for the bonus damage from Q and for your alt. Also if you read, ive had some success using Phys Dam runes,and AP, but not as many victories. So again, when testing out the AP/PD runes, im trying out other tiems and such, and ill be testing out other masteries for it to.

I don't see the use of your magic penetration sice you built all your items with AD.
Why do you take mag pen boots & runes but don't have any AP item?

i havent used this guid yet but in my experience playing him you need to add more deffence items to your build

Build worked for me!