[Inaros Prime] is the only frame that is able to do a special Baro defense mission. This build uses the only damaging AoE ability with no line-of-sight requirements that we can subsume to finish the mission faster.

Thermal Sunder is essentially our only choice here. Fire Blast is okay but for all intents and purposes in this mission it's much worse. It doesn't matter what ability that you replace for it. We're using the Negation Swarm augment so Scarab Swarm probably isn't the call.

Duration is a DPS bonus on Thermal Sunder due to how the heat procs work. We are only stacking heat procs on this build so lowering your duration by cutting [Primed Continuity] or using [Transient Fortitude] will make you struggle against the more resistant enemies.

Efficiency is boosted up a bit as [Inaros] has a small energy capacity and you'll usually have to run around the map between waves to get energy orbs.

Range is boosted fairly high to hit more enemies. We lower [Overextended] by one rank to fit into the polarity plan while also giving us ~10% of our damage back.

Strength is high enough to instantly kill most enemies other than the Bailiffs and Hyekas. [Umbral Intensify] can be dropped to max out other mods but you may struggle to kill more enemies in a single cast.

[Corrosive Projection] and [Coaction Drift] combine to allow us to kill additional enemies. They are a small DPS boost but you can run [Enemy Radar] mods over one or both of them.

Negation Swarm is lowered to rank 0 to fit into the polarity plan. You shouldn't be getting hit many times anyway due to your AoE attacks so the doubled armor loss from blocking a status effect shouldn't be too consequential.

Arcane [Guardian] simply boosts our survivability. We don't have room for survivability mods so at least one arcane should be spent on keeping yourself alive. Arcane Grace is stronger but even more RNG dependent.