Dave wrote:
Wouldn't a formation get its defensive AA before attacks are rolled against it (and so before jinking had to be declared) in some cases?
I agree with you there. They would get their defensive AA attacks before jinking if they were approached within their front AA arc. But after that they should get no more if they jink.
Gaining the benefit of the jink 4+ save should have a downside attached to it and in this case that would include the loss of their future defensive AA attacks once having jinked. Otherwise, like I said, why would anyone with an armour save of less than 4+ not ever jink (unless intending to ground strike)?