First, when you click on “online great battle” that’s what you should get. If people want “offense defense”, make it a separate choice.
Second, if you call in a nuclear strike and you are in the radius, you should sustain just as much damage. How does one exclude themselves from a nuclear strike on their ship?
Third, when it hits the last five minutes, an airplane in the battlefield with a ship up in the corner of the world should not count; either your ship is in the battlefield or you are losing, otherwise just get rid of that whole system.