I think I’ve got it now.
Use the fighter range 2 and bomber range 3 from Guad, but otherwise unit movement is the same as standard A&A.
Combat is one round only, and broken down into 3 distinct phases like Guad (to avoid odd situations, e.g. wherein 1 fighter could grind down a huge infantry stack).
To compensate for the different economies of the two games, give aircraft and tanks the ‘resilience’ ability.
Units with resilience that are damaged get a ‘damage’ counter (from A&A: 50) and are removed from combat. Damaged units get -1 movement and have the same status as transports in this version; they have no fighting ability and cannot be chosen as casualties in combat unless every other friendly combat-worthy unit in the territory or sea zone that is being attacked is destroyed. To have a damage counter removed, the damaged unit must start the turn at a friendly industrial complex, and its controller must pay 1 IPC to the bank.
Tanks are 5IPCs, 0 air / 0 sea / 2 land / 2 move, resilience.
Artillery can use their ability to shoot at sea units only when an amphibious assault is being conducted, and the only casualties that can be inflicted by artillery fire are those units that are directly involved in the assault, or supporting the assault with bombardment.
Battleships and Cruisers can use their ability to shoot at land units only when an amphibious assault is being conducted, and only 1 ship may fire in this way for each 1 attacking land unit involved in the assault.
That’s my proposal in a rough form. Anybody have any thoughts on the matter?