For anyone finding this post and wanting to know what weapon I took : Lex Prime Incarnon
The 5 that met my criteria were Lex, Vasto, Lato, Magnus, Pandero
Settled on Lex because it had the highest damage potential, and I liked the selection of Incarnon buffs
Only issue with it is slow reload and high recoil
The setup:
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Secondary Deadhead - Primarily for the -50 recoil, but it can also up damage
Evo2 - Took the overshields one, but neither of the extra abilities matter on my build. Wanted the +20 damage, which you get on both
Evo3 - +10 magazine capacity, to counteract reload speed, but you could also take the +100 reload speed depending on how you plan to use it
Evo4 - +19 Crit Change and +0.4 Crit Damage
Mods:
Auger Pact, Hornet Strike, Pathogen Rounds, Primed Convulsion, Primed Heated Charge, Galvanized Diffusion, Primed Target Cracker, Primed Pistol Gambit
Resulting in 8059 total damage, 126.3 crit change, x5 crit damage
Also, steady hands, for a total of -110 recoil