People clown on blast but it's actually a pretty good adaptable damage type as it has few drawbacks, combine that with radiation and corrosive and you've got amazing coverage. Best of all we fit all the primed mods in for max deeps. You'd as usual be better off having specialized builds for each race but this is a great build for when you are too lazy for all that. For bonus damage I highly recommend toxin which means you need a progenitor frame of: [Atlas], [Ivara], [Khora], [Nekros], [Nidus], [Oberon], or [Saryn].

Side note, I may end up replacing Shotgun Spazz with [Chilling Reload] but haven't decided yet. (After some testing I don't like it, I typically am not a huge fan of modding fire rate but on this gun it is very worth it, I recommend keeping Shotgun Spazz)

Also make sure to slot Primary Merciless as soon as you can as the reload speed is great and much needed on this gun as well as the DPS increase overall.