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.
Items items items!
At level 4 after getting ninja tabi you consider attempting a gank then resume jungling.
Build heart and aegis.
Late Late Game (in this order)
Consider enemy items and heros are they a majority of AD or AP team?
Build 3rd defensive item accordingly armor or magic resist.