This is something that I've been wondering about for a while, and since I'm probably going to be running a zepp attack mission soon, this is actually now somewhat important.
How do you handle kill xp for non-aircraft targets? How much xp does a pilot get for destroying a building, or strafing a defensive gun? How much is a zeppelin or ship worth? And if multiple pilots collaborate on a ground target (which, for a zepp or ship, they probably have to) does the xp only go to the pilot who strikes the final blow, or do they share it?