7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
60% Strength on your First Attack every 3.5-5 seconds.
14-20% Strength for 5s when every pellet in a shot hits the same enemy.
Up to 14-20% Damage on Hit (Staggered Enemy), scaling with Stagger.
This is not my YouTube video or build but she has a great description of how this works.You're practically a knife stealth zealot with a massive shotgun that you can quickly switch into.
Infiltrate having -90% threat means even when you come out of stealth you won't be attacked for another 10s giving you plenty of time to pick up allies or hit things in the back of the head.
Swapping weapons every 3 seconds gives a ton of survivability since that's 20% every time you do it
Always Prepared and Survivalist combination gives you infinite ammo on your shotgun.
When swapping between melee and ranged you also gain either:
Infinite Krak Grenades
And finally plenty of Toughness Regen / Gain and sweet melee perks
