The gas haven pattern is not correct:
- Initial Wave is as described - Wave 1: 3 - 4 Frigs; 3 - 4 Cruisers; 3 - 4 Battle Cruisers; 3 - 4 Battleships (trigger: BC) - Wave 2: 2 - 3 Frigs; 3 - 4 Battle Cruisers; 3 - 4 Battleships (trigger: BC) - Wave 3: 2 - 3 Frigs; 3 - 4 Battle Cruisers; 3 - 5 Battleships (trigger: BC) - Wave 4: 3 - 4 Frigs; 3 - 4 Battle Cruisers; 5 - 8 Battleships (trigger: BS) - Wave 5: 3 - 4 Frigs; 4 - 6 Battleships (can have Shadow, Dread or Titan spawn)
The numbers might vary from the list above