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.
As long as you don't get shut down early game you should be kicking some hard *** even if they have oracles. Just make sure to stay away from wards or hide around corners if they have wards/oracles. This is a TT build. Doesn't work well on SR, in which I would replace ignite with teleport and grab that talent for it so you have more mobility. Your choice in the end though. Just giving you ideas.