If you want to be the best you need to think like the best. Only read the spoiler if you want to know the correct answer: [spoiler]Hung Jury, Havoc Pidgeon, Raid MG Sidearms are by far the best gun to shoot the balls coming at you from his chest. Even if you get behind you can just spam shots and easily take them all out. The one I use has outlaw, which for some reason proc' when you shoot the balls. Use a combo of scout and MG to make sure the orbs are down prior to you needing to take his gaze, one shot with a 310 Hung Jury will take the gaze.[/spoiler]