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.
start off with boots and pots of your choice, and as soon as you can build a sheen. from there on out items are as you need, choose crystal staff if having problems staying alive.
the point of this build is to use your E and Q ability in a combo to either initiate or to pick off the weak, if you do initiate just remember that once you burn your combo you need to get out ASAP or burn your ult to stay in the fight.