Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This build is made to be the "Run N' Gun" of your offensive team. He is fast, good cool down reduction, high attack speed, and decent armor penetration. The Armor / bloodthurster make a great combination to give you the life regeneration you need for long fights / survive ganks. The key thing to remember with this build is that your not invincible, its made to make WW the pusher WITH your team. Use hungering strike often as it does great damage and will keep you healthy, and save Infinite Duress for the stragglers who try to run at the end of a team battle.