**The “four-pipers” converted to fast transports were officially listed as APD, not DDAP. It would be easiest to use standard US Navy designators.
Carriers:**
I am not sure what you mean by a separate class of “fast carrier”. All US fleet carriers, from the Lexington and Saratoga through the Midway Class could make a minimum of 30 knots, except for the Ranger with a trial speed of 29.25 knots, and the Wasp, with a trial speed of 29.5 knots. The Independence-class CVL, converted from Cleveland-class light cruiser hulls showed a trial speed of 31.6 knots. The only “slow” carriers that the US had were the CVEs, which had speeds from 16.5 to 19 knots. As for “fast escorts”, again, what do you mean? All US cruisers could do a minimum of 30 knots, as could the Iowa-class battleships and the Alaska-class larger cruisers. The only slower ships were the old battleships, the treaty-limited North Carolina and South Dakota class of battleships, and the destroyers escorts. I see no need whatsoever for a separate group of “fast ships”.
The first of the Essex-class carriers, the Essex commissioned on Dec. 31, 1942. The first Midway-class, the Midway, commissioned on Sept. 19, 1945. I think that the Midway class can safely be ruled out for any type of expanded Solomon Islands campaign.
Time Frame:
I would argue that with the capture of the Admiralties in March of 1944, that the Solomon Islands campaign effectively ends. You should not worry about anything beyond that date, and with a 3 month lead time to get equipment, except aircraft, to the theater, I would say that the cut off for any new ground equipment should be December of 1943. That rules out the Sherman “Jumbo”, produced in the spring of 1944 all of which went to Europe and the Pershing. The Sherman was more than adequate for the Pacific as the heaviest Japanese anti-tank gun was a high-velocity 47mm piece, good against the Stuart, but marginal except at very close range against the Sherman. Some Pershings were deployed on Okinawa, and if you really need them, Table Tactics makes a very nice Pershing as part of its Engage series, although it would be a little large for A&A game scale.
Unit Types:
The Solomons campaign was fought in JUNGLE. You might need mechanized infantry and self-propelled artillery in Europe and North Africa, and maybe in the Philippines, but not in the Solomons area. You are not going to be able to use it at all. You might want to include a DUKW unit, for resupply.
Assuming you go with the early 1944 cut off, then you eliminate the P-51 and the B-29, and the P-38 was used as a fighter-bomber as well. There would be no Montana-class battleships. The Iowa and New Jersey commissioned early enough in 1943 to possibly be involved, except that they were used in the Central Pacific as the only battleships that could keep up with the carriers. The two Alaska-class ships to commission, the Alaska and the Guam, did so in June and September of 1944 respectively. You should have a Catalina for reconnaissance and as an ASW plane.
As for carriers, the Essex-class could carry over 90, with an air group of 36 fighter, 36 dive bomber, and 15 -18 torpedo planes. Japanese carrier groups were no where near as large. I would argue that an Essex should have 5 aircraft, not 3, 2 fighter and 3 attack, or 4 fighter and 1 attack. Morison does a very nice job of giving carrier air group information in his books. A CVE has 1 aircraft, either a fighter or attack, a CVL has two aircraft, a fighter and an attack, Enterprise or Saratoga-class, 4 aircraft (one or two fighter, two or three attack), then Essex class. That is for the US, I would need to look up the data for the Japanese. If you have to make things even for the Japanese verses the US, 1 fighter or attack for a CVE, a fighter and an attack for a CVL, and 2 fighters and an attack for a CV. Note, a P-38 looks really weird on a carrier.
Table Tactics already was producing land mines, and they could just as easily be used as naval mines. However, land mines were used very little in the Solomons, mainly because of the terrain. Naval mines were used, but are you sure that you want to introduce them? Some areas, such as Iron Bottom Sound, are far too deep for mines.
Other areas, like Ferguson Passage and Blackett Strait near Kolombangara, can be mined and were. On the whole, the water depth in the Solomon area is really pushing it for mines. Also, are you going to allow for aircraft delivery? Air-delivered mines proved to be very effective in the Bougainville-Shortlands area. Mines mean minesweepers, added cost and complexity. Are you looking at a game or simulation? A game can be done with the KISS principal. With naval and land mines, you are straying into simulation or much smaller scale territory. You give someone who knows what he is doing or has a creative imagination land and naval mines, and you will find out how fast that they can change the game.