Due process is kinda bad, I would put those points in something else, I know you don,t have a lot of options, but you will not even notice it. If you plan on doing a bit of melee, I suggest 3rd degree.
Shotguns are the weapon type that benefit the most from trick shot, since even with a perfect aim, they still have a spread.
Don’t skip unforgiven… ever… seriously, even if you don’t plan to use showdown all that much, it does everything including giving you second winds.
I actually made a Nisha shotgun build centered around the Kid COM and I’m rather proud of my writeup, you should look it up
Might not be exactly what you’re looking for, but it’s still full of good info
Using the Bullpup as a primary weapon on Nisha, with over 15 points in fire rate skills… I can already tell you that you’re going to run out of ammo
you need to use a more efficient weapon as a primary gun and keep the Bullpup as a boss/badass killer (yes, it will crank out enough DPS for that, trust me)
Fistful of bullets is always worth a point, unless you’re doing shenanigans around mag6. Otherwise, it’s a great mag size increase for the price.
Nisha’s most powerful skill is Tombstone, no question there
but arguably her second most powerful is Unchained, you should give it a second look
I say go for really slow really powerful shotguns, and make em faster.