2. Acquire 8 Dozer Tanks from Barracks and keep getting at least 2 Neocyte Guards from the 2nd mission ("By Torchlight") to match mission requirements dominating the 3rd mission and keep advancing.
3. Acquire Skullkeeper in the 3rd mission (and replace Thadius with him in your formation).
4. At this location you should have at least 120 energy points.
Chance Loot: Assault: Neocyte Guard (30/28), 10% chance
Chance Loot: Commander: Skullkeeper (38/16), 10% chance
Advice: Replace Thadeus with Skullkeeper.
MOVE FORWARD. For a more efficient progress, advance to the next location: Triton Ocean
Chance Loot: Formation: Fortitude (3/12/4), 25% chance
Unlocked when you get 100% Domination in 4 Missions in the Caverns location.
Assault: The Beast (40/60), 3% chance