Outpost Frontier Stronghold

Outpost Frontier Stronghold - Cosmic Anomaly
Class 3 Complex Site
NPCs - Hostiles

First Encounter
Argos x3 (Platform)
Sleepless Defender x1 (Battleship Class - )

Killing the Sleepless Defender triggers the next spawn.

First Wave
Awakened Defender x4 (Cruiser Class)

Killing the last Awakened Defender triggers the next spawn.

Second Wave
Sleepless Defender x2 (Battleship Class - )
Emergent Defender x4 (Frigate Class - )

(Source)