I don’t understand why you all want to make AA Guns more powerful than they already are. As it is, each single AA Gun gets to fire at up to three attacking aircraft. Granted, they only hit on a “1”, but any of those hits will kill the attacking aircraft with no shots from the aircraft whatsoever. A lucky roll by the defender and it can get very expensive for the attacker, not to mention his/her ground forces losing that all important air support. Then, on top of this, after they have taken pot shots at the attacking aircraft, you can use these same AA guns to soak up hits and save actual “shooting back” units for another round of combat. In a close battle, even one or two extra hits could make the difference.
Frankly, I think they are strong enough just as they are. Fire the FIRST round of combat only. Also, for any of you that think this is not probable, consider this: by the 2nd round of combat, you could consider the two sides “fully engaged”. In other words, attacking planes and defending planes would be going after each other in the skies. In that case, you don’t want to be blasting away with AA fire for fear of hitting your own planes. It’s the same idea as cruisers and battleships only providing shore bombardment on the first round of combat. If they kept trying to bombard the shore in further rounds, they take the chance of blowing up the attacking forces.
By the way, I do think it would be cool if China could capture a Japanese IC and make artillery and even tanks. Plus, I have always thought that if the Chinese fighter were lost, USA could fly another over to replace it. In fact, since the US was supplying China with most of their war goods, I don’t see why the US couldn’t fly more fighters over to become Chinese, like say a max of 2-3. After all, it would be kind of silly for the US to fly over 10+ planes and suddenly China has this huge air force.