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.
Landing Qs is very important for your damage in lane, and you have a very high critical damage, so you can burst out other carries very easily while dodging their abilities with your E. This build spikes when you get trinity force, and goes wild from there. This build has solid damage throughout the game, with very high damage at late game. It is important to keep your distance, but is best to stay just inside your own auto attack range.