1.6M burst DPS with 450K sustained (285K / hit)
Simple build with viral and electricity- not usually the go-to but melts a lot of content fast enough that you wouldn't really care, especially with the range and accuracy you get with the [Strun Prime] since it has slash baked in.
Pair this with a frame that boosts weapon damage like [Ember], [Frost], [Zephyr], [Harrow], Chroma, etc. and you have yourself some fun.
You can get Radiation and Cold if you use the following ordering instead - Primed Charged Shell, Blaze, Primed Chilling Grasp - this gives you the same stats as the current build but allows you to be a bit more dynamic depending on what you are fighting.
You can also switch out [Primed Charged Shell] with [Blaze] for a cost of 300K burst DPS if you need Viral + Heat.
Another alternative is to switch out [Primed Charged Shell] with Hunter Munitions and Vigilante Supplies with Shotgun Ammo Mutation. The build becomes 1.06M burst with 300K sustained (175K / hit) but gain slash sprocs in spades to ignore armor and go directly for health.