Build only uses the normal mode of the shotgun most of the time as loading the incarnon mode isnt really easy from what i experienced, it is really good with primary merciless however
Evolutions
+16 damage +4 Pt at +450 armor (+10 damage on an inconsistent empty reload is really meaningless)
+50% accuracy (Merciless is quite enough to make the reload worth the while, hitting more pellets means more damage but you can always prefer of either going for the reload or the accuracy)
+25% cc and +0.5 cd as none of the other perks really give much statuses unlike [Hunter Munitions] (with the exception of incarnon mode)
The new incarnon adapter for the [Boar] has made it really good now, not as damaging as the [Strun Prime] but the room clearing makes up for it
You can use shotgun vendetta if you want, but it only works on the shotgun mode
You either want to use an [Blaze] or [Hunter Munitions] build (corrosive if prefered) as the [Boar Prime] already has an decent amount of damage
I'm using [Vigilante Fervor] instead of [Accelerated Blast] or [Shotgun Barrage] because i currently have nothing to control the recoil with... But you can slot primary deadhead and the reload perk to make up for it