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.
Vampyric scepter: is very useful in the start because u do alot of damage in the start.
Sheen: U need more mana and the sheen gives u a nice boots on the next auto attack when u have used a ability.
Berserker greavers: Very important to get movement speed up and abit attack speed u will run around 430 with trinity force and boots.