Best weapon id say was the Cydonia AR3 with firing while scoped reduces fire rate but increases damage. Gozen-C sniper butcher rocket launcher, dammerfung fusion rifle, sargon-c heavy machine gun also feature in my set ups
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Jigoku SR3-SL Scout Rifle, Suros MKB-33 Auto Shotty, Timberlane-C3 HMG (Slower firing with high impact) That was my build for PvE as I didn't enjoy PvP even when I pulled a match with a K/D of 2.5. (I mention this match as that was indeed my best with one game even holding a ratio of .6, .63, and one 1.4 as the Hunter class is at a disadvantage during Control missions due to the Titan and Warlock supers on control points vs that of the Hunter (Not a complaint, there will be mission types in-game that will rectify this.))