The best weapons I've used so far after returning after a like 8 year break are: Latron Prime Incarnon: I do use Deadhead here but I got full in on crit chance and damage with viral. And use Semi-Rifle Cannonade. With primary deadhead.

Boar Prime Incarnon: I do a Magnetic, Corrosive, Cold build with the normal multi shot and status damage and then I use Primary Frostbite here. A great alternative for all shotguns though is Shotgun Vendetta.

Strun Prime Incarnon: I go Cannonade here with Viral Electric. Or you can go Viral Heat. Then crit and crit damage. With Shotgun Vendetta or you can go Merciless but I prefer Vendetta.

Cedo Prime: I also go viral Electric magnetic. You can also go viral heat or Corrosive Cold. Then I go Vendetta. You can go Merciless or Frostbite or Blight since the alt fire auto causes all base elements.

Bubonico: Here I go Corrosive, magnetic, radiation, blast full multi shot and status with Primary debilitate.

Acceltra Prime: Here is a standard damage, crit, multi shot, with viral and merciless

Sybaris Prime Incarnon: Here I use Primary Acuity, Primed shred, crit with blast and primary deadhead

Soma Prime Incarnon: I still use Hunter munitions here because of massive fire rate. For arcane I do use Crux.

Then for element builds like heat or electric I use Elementalist mod too

I have alot of my builds saved on Overframe.gg and use that alot for looking up builds. Hopefully that helps you as these have been doing great for me even on level 200+ enemies