After some consideration, I'd like to suggest this revision:
The gaps in the plane set are really too large to do all of what I want to do with this set up. Additionally the real focus is the reduction of Rabaul, and by this point in the war Japan was largely on the defensive and unable to mount an sort of appreciable counter-offensive against American airfields and bases. Therefore I'm removing the Japanese bombers. This setup I think would be more effectively run if treated like the Battle of Britain: Japan only defending while the US only attacks. This will also help alleviate the disparity between the American and Japanese aircraft by allowing the Axis to field their entire force as fighters. Combined with a 60/40 split that should help finish balancing things out.
American targets would include Japanese bases facilities on New Britain and New Ireland and the surrounding islands, as well as convoys (task groups with CAs and DDs only. No IJN CVs in this setup) in the area.
Plane Set
United States
F6F-5 (limited, CVs only)
F4U-1A (limited, Bougainville)
P-38J (limited, all land bases)
P-39Q (all land bases)
P-40E (all land bases)
SBD-5 (CV and Bougainville)
TBM-3 (CV and Bougainville)
B-25C (all land bases)
B-25H (limited, all land bases)
PB4Y-1 (Eld:
) (limited, all land bases)
PT Boat (limited, optional, 2nd life in fighters -- at least one convoy should be placed within range of a PT spawn and indicated as such in objectives if the Allied commander wishes to use PTs)
Japan
A6M5
Ki-67
Side distribution: 60/40
Allied Special Mission: "Black Sheep One" - One Corsair pilot is designated as Boyington. Allies receive a bonus for any aircraft he shoots down. Axis receives a bonus if HE is shot down.
Possible Japan option: Include a limited number (say, 20-30) A6M2s. These pilots would have a 2nd life in this aircraft. This would be more an option to give a little more variety to the Axis plane set, and could further help balance the Axis in a similar manner as Vals and Kates with second lives would.