This is where you lost me. You WANT USSR to attack UKR, but then you place an AA gun there, which should assure you that USSR does not attack UKR.
Now, if you placed an INF there, you have better odds of USSR doing what you want them to, and you still have an art left over for lybia.
Therefore, aren’t you better served with an inf placement rather than your AA ?
Quoting myself… Here we want Russian to either not do the Ukraine opening OR to commit 3 tanks to do it instead of it’s 2 fighters + 1 tank.
So no, infantry bid won’t ensure Russia commit 3 tanks if they still do it since they can use fighters without risks. Of course i’d rather keep Ukraine but i plan for the worst case scenario also, which infantry don’t allow me to do. I’m also using that AA gun to protect my 10 units stack G1 once i retake it. It have no value for Russia since i don’t need air units to do so.