If you get unlucky in the first few waves and face units that can easily rush past you (like air units), just restart. Your aim is to pass wave 15 without the Terminus (the thing you're defending) taking any damage. This is not particularly likely, but it's worth being aware of. If you are particularly unlucky, you might face waves and waves of anti-air units, making your mostly air unit army strategy somewhat less effective. You will face Banished, UNSC, and Flood units.

Fully upgrade any turrets you build as Banished, while upgrading any you build as USNC to anti-infantry as these are the most likely units to give your air units trouble.Īll waves in this game mode are random, so I am unable to give you wave by wave advice. You should also build your leader's hero unit from the Armory/War Council.

Build and fully upgrade as many air units ( Hornets and Banshees) as you can, while keeping some healing units ( Nightingales and Engineers) mixed in. Once in game, you will build your army composition similarly to how you defeated most of the campaign. The leaders you choose do not really matter and are down to personal preference, but one of you must be a Banished leader and the other a UNSC leader.