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.
Attack Speed, late player stacked with damage.
Very late game character.
The plan is to output as much normal damage as you can without having to use your abilities, aka, saving your mana for enemy players.
Build attack speed runes, and ability cool down.
When fully built you should be attacking 2.5 to 3 times faster then normal, easily suppressing minions, and a challenge for players to kill.
Downside to the build is you're really soft for the entire game. It requires precise timing with your skills to take out players, of course Team work matters.