Jakobs Shotguns with low mag sizes work best with this build. However, you certainly can still use other gear. The Seventh Sense for example if great with this build too if you run out of shotgun ammo. It's also easy to hip fire with, and the crit chance with this build can guarantee that the extra projectiles also critically hit.
Hot Slugger,
Hellwalker,
Rainbow Vomit,
T.K's Wave, and the
Seventh Sense are all great. You can even use non-unique Jakobs Shotguns. The Underbarrel Launcher is super good, and actually has the best damage when the shotgun has the lowest mag size, so keep a look at for those. They are also great for Vile Enemies. I have a non unique Dullahan for example, which has a one shot mag and underbarrel launcher and does work.
If you can get the Legendary Jakobs Enhancement with Piercer and Bounce Pass, that would probably be best.
Quintain is the name. But Piercer and Bounce Pass will both be good. Just make sure to avoid Leaper and Sequencer. We don't need Leaper because we will almost always be getting critical hits, and we don't want Sequencer because critical hit chance (non weakspot hits) will not benefit from it. Anything that doesn't actually hit a regular weakspot will not benefit from the full critical hit formula, including firmwares, enhancements, class mods etc
The
Dancer Class Mod is very important for this build, it's the main piece of gear we have built around as it gives us massive Overdrive bonuses.
The rest of the gear is up to you. Just use your favorite shield, repkit, and ordnance. I have been running the
Triple Bypass which is great for survivability. If you can get an Amp (Amplified) roll, that will give you a big damage bonus. Highly recommend using that with the Underbarrel Shotgun to melt bosses quickly when farming. The Accelarator (Adrenalized) Perk is also nice for action skill cooldown rate. Health Burst (Fast-Acting) will give you extra healing if you'd prefer something more defensive.
For a shield, just use your personal favorite. I have been having good success with the
Cindershelly shield. It will flirt with you and gains more damage resistance every time you take damage.
Again Ordnance is preference. Probably a strong rocket launcher like the
Bottled Lightning would be good to get some damage off with when
APOPHIS Lance is on cooldown.
For passives on your equipment, remember we won't usually benefit from critical damage bonuses. It doesn't really matter outside of that, but I'd look out for non critical damage bonuses, action skill cooldown rate, or whatever other utility you might want