1st configuration build sharing the same forma polarities as the other 4 builds for this weapon.
Primary fire build dealing corrosive damage only. The secondary fire has innate viral procs so always make sure to shoot once alt fire and then continue shooting with primary fire, the viral procs will significantly boost your damage output.
The secondary fire by itself doesn't deal much damage, it's nice aoe room clear but you're essentially relying on pure raw damage for room clear, in steel path you won't last long relying on this.
The weapon has innate Toxin damage on the primary fire so with just Primed Charged Shell you'll be having Corrosive damage already, the reason why Contagious Spread is in is because Primed Point Blank scales way worse since the addition of Primary Merciless compared to adding extra elemental damage.
I can guarantee you the effectiveness of this build againts steel path lvl1000 mobs aka 3 hours of staying in one mission. The thing is tho, at a certain point the mobs will outscale the raw damage you deal so you'll either want to run a build made around [Bubonico]'s secondary fire in order to kill enemies with elemental dot ticks or a primary build made around viral+slash.
Primed Cleanse Faction mods are always better than Blaze! but if you don't have them, feel free to run Blaze for the extra heat procs, they'll be stripping extra armor so it's not that big of a deal. Also Blaze basically gives more than +120% damage increase, since the +60% raw damage it gives is additive, it doesn't get deluded by other +raw dmg giving mods in the calculation, pretty broken right? Also it gives +60% heat damage, which is extra elemental damage and then on top of that because we're running Galvanized Savvy we get +80% extra multiplicative damage from applying that heat proc. But yeah, that's still less than the +140% damage a primed faction mod gives us. But more than the +60% damage a normal faction mod gives us.
If you want to go check out my other configurations visit the links here (they all share the same forma/polarities):