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 is a build mainly for me to look at, no advice. Just items. I had a stab at the masteries and I get the skills as appropriate in game. I dont get the mana on hit for a while though.
Clarity and CLEANSE is so important! Teleport is also good in place of Clarity and you should spec masteries for it.