Please note that this build was meant for my own story purposes only (as you will read in the Warning just below) and that I do not own any rights to whatever I mention as this "guide" progresses.

Warning: IMPOSSIBLE TO MAKE IN-GAME DUE TO CUSTOM SHOTGUN RIVEN MOD!
So just enjoy it for what it is on here and use your imagination, okay?

Edit /08-16-21/: After looking up if Uranium was radioactive (and the result was true), I added Radiation damage to my stats and now when the Conditionals are applied... Well, you can see for yourself. >:]

Edit /03-26-22/: Replaced "[Accelerated Blast]" for "[Narrow Barrel]" to improve the accuracy while aiming (retrofitted variable choke system, like in MP of DOOM 2016). I also switched the Punch Through Buff on my custom Shotgun Riven Mod for a Reload Speed Buff because the reload is more important than the penetration (and I was originally going to have a detailed explanation to this change but I couldn't form the right words to have it make sense so I just took the easy way out.)
Currently trying to figure out/find a way to maximize the damage when throwing a fully upgraded Shotgun Amp Aura Mod into the mix. I know that doesn't make sense, but you should get the point I'm trying to make, right?

Edit /08-08-22/: This was a hard decision to make, but I replaced "[Double-Barrel Drift]" for "[Lock And Load]" primarily because I actually OWN this mod now after a lucky drop from a Sentient either last month or the month before, plus I specifically remember in the DOOM (2016) campaign, after fully upgrading and mastering the Super Shotgun to acquire 'Double Trouble' (where you get to fire two shots instead of one before reloading); that if you were to fire one shot, switch to a different weapon, then back to the SSG, it will be fully reloaded however, your ammo count won't be even due to this automatic reload mechanic (which personally bothers me but that's because I have OCD).
So, there you go. One last thing I forgot to mention is how the "Lock and Load" mod fits into a weapon with a Duplex trigger. The answer is simple, melee attack and/or after firing both shots in the 'clip' so you don't have to reload it yourself.