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.
I used to use a build very similar to booshido's AD Ezreal build, but after the mana regen nerf I found it tough to farm and harass. This is a variation that includes manamune so mana regen runes are not necessary. Because you get phage a little later in the game I opted for health per lvl seals instead.
I'll come back and refine this guide later.