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.
Threats to Graves with this build
Graves is super op if u can land your Q against a wall. He is really good against anyone without an escape left or who's really squishy. J4 I found CC'ed me so hard. Kalista can just dash around you. As Graves he is probaly the tankist marksmen(other than Mordekaiser) so you may wanna jump into the fight but dont. Stand behind your tanks and do the damage from far away and always try to split if you are fed.