ORIGINAL: Cheesesteak
Going to have to seriously up my game if I'm going to catch meaningful pockets of the listed unit types.
Just remember, that you don't want to cut enemy out in the open. They won't surrender, but create zombie resistance. It could take you few weeks to reduce that pocket, and they somehow cause lots of damage.
GetAssista - I'll work on getting that trick to play out. My thought is to use the scenario-specific additional bombers to strike at China. It's only one under-strength sqdn now, but will be a good use of airframes.
Formosa is the same command as Japan. You can move most of restricted units there, and BETTYs would have lots of China in range (but beware, you will probably have no units to train new pilots for 2E IJN bombers).
Port Arthur, and Korea-China border also allows to stage some planes from Manchukuo Garrison. Not many Chinese targets in range, but still some, especially for 2Es.