This runes are very uniqe you can find them in other champions like Lee sin, Irealia, attack damage is needed because he is a very weak champion, Armour pent is needed for his Attack damage runes without pent he wont be able to hit >.< Armour is also needed because your build isnt as quit strong and [packed with armour]

These iteams are very uniqe =) amazing one on one action and even amazing in team fights.like Trinity Force amazing attack speed damage and witts end is an amazing 1v1 iteam ever strike give you increase off attck speed and then you have your warmongs to keep you laning for a long period of time and for a little bit of tank inside your gameplay,

All you need to do is keep back from fights and you will found yourself at 200+ minion kills a game witch can help you withdraw your iteams extremly fast Good luck..