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 my first build, but it always works out for me. It uses Singe's huge mana pool with items that build stats based off max mana. Also with Manamune and Lichbane together, your toss and first melee hit will be devastating.
Their unique passive's speak for themselves. Duel Rod of Ages is optional, just to give more hp, mana and AP, and their passives are NOT unique, so they'll stack.