[Primed Firestorm] can be flexed in for another Madurai polarity mod like [Serration] if going for raw damage instead of CC. Slot for [Primed Cryo Rounds] is left unpolarized to allow for build versatility against specific enemies or factions. Magnetic progenitor infusion to burst down enemy shields; it also allows for your primary damage to be whatever elemental combo you want since magnetic doesn't combine with any damage types.