how you going to track a target at 30k.........?
festerbria is right radar guided flak is needed with killshooter on and proximity fuses that go off no matter whos around. Maybe keep ack from firing when friendlies are all around. Maybe a player could take control of a whole battery of 88/5 in.
hopefully the player will need to guess (calculate figure whatever)range speed etc instead of crosshairs on the dot and fire.