Co-op style

[Sokol1]

Since your objective is dogfight, why not instead aircraft create "Spawn area"?
So every player create one aircraft, with preferred loadout, fuel, etc.

Easy way: edit one of these mission include with game - in dogfight folder - remove existent AI flights - these that have waypoint's - an leave only "spawn area".

If desire you can limit aircraft type that can spawn in some base, ie only RAF, only fighters, etc. Look in "Spawn area" object properties.

Ad some AAA around base to inhibit "voulchers"... Set ratio of fire above "1" or they only made "fireworks" show.

Sokol1