(Faction) Burrow / Drone Collection (easiest)
(Faction) Hideaway / Drone Cluster
(Faction) Refuge / Drone Gathering
(Faction) Den / Drone Gathering
(Faction) Yard / Drone Surveillance
(Faction) Rally Point / Drone Menagerie
(Faction) Port / Drone Herd
(Faction) Hub / Drone Squad
(Faction) Haven / Drone Portal
(Faction) Sanctum / Drone Horde (hardest)

Level 1 = (Faction name) + Anomaly Class (easiest)
Level 2 = (Faction name) Hidden + Anomaly Class
Level 3 = (Faction name) Forsaken + Anomaly Class
Level 4 = (Faction name) Forlorn + Anomaly Class (hardest)