Just fighters for airport troops. For ground troops use 12 or Commandos and the rest Bazookas. To start the battle spread out 3 separate commands on each side of the map, use your fighters to protect them against defenders. After the first defense wave you do with the Fighters, deposit your bazookas around the map 2 by 2. Keep protecting your commandos and bazookas with the Fighters and that's it. Good luck.