150,000,000 = 1 AU
300,000,000 = 2 AU
450,000,000 = 3 AU
600,000,000 = 4 AU
750,000,000 = 5 AU
900,000,000 = 6 AU
1,050,000,000 = 7 AU
1,200,000,000 = 8 AU
1,350,000,000 = 9 AU
1,500,000,000 = 10 AU
1,650,000,000 = 11 AU
1,800,000,000 = 12 AU
1,950,000,000 = 13 AU

(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 Patrol
(Faction) Sanctum / Drone Horde (hardest)