When it comes to the mod loadout it is important to remember that a weapon should suit your playstyle.
The [Boar Prime] comes with 3 polarities, fairly high critical stats and good status chance makes this a very flexible weapon. This weapon reloads one slug/ammo at a time and you will need to reload a lot so be proactive about pressing that reload button between shots to make full use of this weapon.
This mod config takes advantage of the single slug/ammo reload animation as Repeater Clip activates when one slug/ammo is placed into the chamber. [Chilling Reload] helps balances the fast fire rate.
[Repeater Clip] can be replaced with Shotgun Spazz if you don't like to aim all the time. [Chilling Reload] with [Primed Chilling Grasp] but it would require another 2 formas. The 40% reload speed is nice.
Happy Hunting.