That is why the ratio is stacked heavier with infantry, you know the cannon fodder guys. I will see if I can find Darth’s post because I think it was in a thread and not posted as a thread. If I recall correctly Darth tested things several ways.
Myself I do not play AA like an accountant. One a stack hits a certain mass I like to have some Arty in it for the boost. I don’t care if it gets it bonus once, twice, or three times, I just want it to get the job done.
My main point is it is a waste to fritter away Artillery in small trade battles where they will be used once (no matter how many rounds it goes) and destroyed the next round. For Russia this normally means keeping them at home until a straffe on Germany or if things are going well when it is time to move out against Germany and take the offense, although that happens way more in '41 than '42 since a competent German player should be relaying infantry to Karelia with his Baltic fleet.