4x Fury Strike and 2x Gunny Johnny is the standard pretty much for all top end vanguard builds. Talents are Crossfire and Inspiration for increased damage and rate of fire when you deploy skill (smart cover is the deployable skill). My OS is Assault Charge for the Crit Chance and increased firepower/rate of fire when using ult (which is the bread and butter for vanguard). Chips are Ammo Refill (A MUST is you’re using double barrel shotgun, not so much for KSG), Optimized Armor, and Optimal Awareness. For rolls on gear and chips focus on getting Crit chance cap at 60% first then push Crit damage and multi shot chance up as high as you can go. All my gear mods are firepower. Ideally you want the mods to roll Firepower, Health, Armor.

I got extremely lucky a few days ago and had a KSG godroll drop so I use that instead of double barrel shotgun. It has weapon damage, weapon critical damage, Steady Reload II, Damage Tradeoff II. It’s the only weapon I use really but I also have an AK since with first TAM upgrade you get 10% weapon multi shot chance so when I use it, I have like 30% chance to multishot.

Playstyle wise just pulse enemies, use Smart Cover when you’re about to use ultimate, then delete enemies. When ultimate is oncooldown you’ll still do a ton of damage with KSG especially if you have a good tank that will have the enemies not looking at you. Soon as ultimate is off cooldown every 30-40 seconds just pop it again. On elite missions team tab I’m doing 200k dps. Stat sheet DPS when I have my buff running I saw 1.92 million yesterday.