I'm a MR19 tenno, happy to share my build of this amazing AOE weapon. Since MR15 is already veteran level and considering lich as endgame content, I don't actually feel this build useful, but I would share it anyway for more to enjoy it.

In terms of room cleaner, this is the best in my opinion: It has an amazing AOE range (7m), only inferior to [Staticor]'s 8m and [Amprex]'s 10m, and provides CC & DoT via [Nightwatch Napalm]. Most importantly, no charge is required so we can just SPAM it everywhere! And the animation is really cool especially after [Nightwatch Napalm] is equipped.

It has a few drawbacks though: self damage, low ammo reserve, relatively long reload since only magazine is only 3. Cautious shot and fast hands are added for this reason.

My current quality-of-life build is used with [Wukong] clone, and it is very useful in clearing rooms of enemies up to level 120, which is basically endgame contents except for boss fight & long arbitration.

I use a viral build to double effective DPS since this weapon has a very high status chance but low shot rate. You can replace fast hands with vigilante supplies if you feel ammo is an issue.

Max ranked cautious shot with is a must-have to fully enjoy this build without hurting yourself.
For Primed mods, if you don't have it, normal version should work almost similarly.

Explanation for mod not equiped:

• It already has a very large AOE range of 7m, so my testing shows Firestorm is not very useful.
• Aim at quality of life not min-maxing damage, so not too many DPS mods.
• Heavy Calibar has a perceivable effect, don't work well on it.

Disclaimer:

Not suitable with glass tank, they would still die even with [Cautious Shot].

Don't expect it to work on heavy gunner and nullifier, but it does a great job replacing my [Ignis Wraith] & [Amprex].

For boss flight, please take the right weapon. This is best for a lot of other places where you need to kill tons of enemies.

Have fun!