Core Stronghold

Core Stronghold - Cosmic Anomaly
Class 5 Complex Site
NPCs - Hostiles

First Encounter
Emergent Sentinel x4 (Frigate Class - )
Orthrus x6 (Platform)

Killing the last Emergent Sentinel triggers the next spawn.

First Wave
Sleepless Keeper x2 (Battleship Class - )
Sleepless Warden x2 (Battleship Class - )

Killing the last Sleepless Warden triggers the next spawn.

Second Wave
Emergent Warden x6 (Frigate Class - )
Awakened Sentinel x7 (Cruiser Class - )

Killing the last Awakened Sentinel triggers the next spawn.

Third Wave
Awakened Warden x4 (Cruiser Class - )
Sleepless Warden x3 (Battleship Class - )
Sleepless Keeper x2 (Battleship Class - )

(Source)