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.
First start with a vampiric scepter because it gives u a lot of survavility and help u stay lannin for long time, with this u will be able to farm enougth to get chalice of harmony and then some booots (berserker graves would be fine).
After that you will notice that u dont have atack, so get sword of the occult and then start stackin, sivir is pretty goood gankin so it wont be a problem.
After that get phantom dancer for atackspeed/crit, and finally end with more damage, infnity edge or blooodthirster would be good.
Why u want so much atack?? because the atack also makes ur Q ability to hit harded, so u will ace the whole team with 3 Q´s.