This build is all about the Armor Penetration, Attack Speed and the Defensive things. Armor Penetration is that in the early game you going to need Armor Penetration, you doing much dmg if u against a alistar you going to need the Armor Penetration. The Attack Speed is that if you got your e at start you going to max it on the targets as fast as you can, so you doing so much dmg as you can. Armor and Magic resist is the survive ability you got in your hands you dont have to care about the dmg cause in early game you got alot of armor and magic resist and not taking so much dmg.