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've seen em out there, but never like them. thought I'd offer my outlook on swain dps. Because of his third skill, TORMENT, this is actually a legitimate build. Max that first and fast, target your opponent and keep attacking. you'll be surprised how much damage you do. Make any changes you want, this was just a quickie.