A single BX commando at the height of the clone wars were renowned for their effectiveness in combat. Aside from the IG-100 magna guards, the BX models were used to guard VIPs, assassinate enemy officials and sabotage key targets to name a few. It was this skillset that had allowed N4-X4 to infiltrate Fortress Vader under the nose of Darth Tempest and her so-called Sith, download its archives and exfiltrate leaving everyone none-the-wiser.
The contents of the archives were coded individually and could take literally lifetimes for the BX commando droid to decipher on their own. However they had some luck and chose a familiar subject to decrypt. The Klegger Corp Mining Facility and its secrets opened to reveal detailed files on the mining operations there. But more than that. The data it contained clearly indicated there was not only one, but several droid manufacturing facilities hidden beneath the surface. Furthermore there were Confederacy of Independent Systems markings and terms used in frequency.
After discovering this information the droid made a tactical choice and reached out to the occupiers of the molten planet. Naxa would be hard pressed to keep the facility a secret in the long run since it was practically next door to the dark side nexus. But rather than see it as an obstacle, the hunter calculated an opportunity. If production could be restored then a portion of machines produced could be put to use for the Sith while the rest were sent on key missions for N4-X4's own ends.
N4-X4 was a capable BX commando droid with a long track record but there was only so much the war machine could do alone. The reasons that they wanted to acquire the alleged "mining facility" were the same reasons it was dangerous. The structure may have continued operations in the years after the Clone Wars but it was largely forgotten and not mentioned anywhere publicly. N4-X4 had a map of the facility's interior but that did not mean it had remained the same over the decades. It also meant there were likely scores of battle droids, maybe even hundreds of all makes and models capable of defending the building. Caution was warranted.
The exterior vulture droids had already been dispatched by the N4-X4 and allowed for a relatively safe approach of the droid factory. They would be joined by a Sith Champion. In return for the Sith's assistance they would also get a portion of the droids manufactured to serve as a personal army.
N4-X4 watched the surface entrance for any signs of activity but found none. The volcanic planet was not exactly a tourist attraction and the locals kept to themselves. Droid sentries were likely under maintained without supervision or outside resources. But Naxa would see to it that any damaged machines would be respectfully recycled and put to use. Now they just needed to wait for the rest of their assault team to arrive.
@René