I am still developing an opening script, so recognize I haven’t even come near optimizing this opening.
My J1 opening is intended to support my goal to wipe out China quickly and to have enough transports in the right places to make a big move J3.
Attack Yunnan with all the ground forces next to it along with several air units that can reach Yunnan. Attack the other 3 Chinese provinces that are gimmies. Take control of FIC with 1 infantry from Siam. Non-Combat Moves = Swap the Carolines fleet with the fleet in the Sea of Japan placing the big fleet at the Carolines. Add a couple fighters and Tacs to Carolines. Move 1 Armor and 1 Inf to the ter S/ of Hong Kong and 2 Inf to the ter N/ of Hong Kong using 2 transports in SZ6. Buy 1 Tran and 2 subs and an infantry or arty or something. Move the tran from Carolines to SZ6.
This adds ground units to the China theatre, places 2 trans in SZ 6 for another move to relocate units on J2 and beefs up Carolines which looks threatening to ANZAC so UK is less inclined to do anything crazy. I buy a few subs early because I find they are quite helpful as cannon fodder in many sea battles.
J2 I move the trannies from SZ6 w/ 1 arty & 1 Inf each to Carolines, move the two trannies off China Sea to SZ19 (I think) just South of Korea. To meet up with units walking down from Manchuria. Attack and win 3 more Chinese territories and link up my other ground forces in Yunnan for a big J3 strike on a stack of Chinese infantry and the Flying Tigers in Szechwan. Move my new subs to Carolines. Buy 2 DD and 2 Trannies and a couple more ground units. Position the small IJN fleet to support any invasion such as Philippines or Celebes.
This adds more transport capacity and gets infantry and artillery on Carolines adequate to threaten Hawaii or a landing in Australia, or several DEI territories, along with units that will strike the Philippines from SZ19, and a pincer move on Hong Kong. All this will happen J3.
Depending on what the UK and ANZACs do, I will prioritize targets for J3, but it is unlikely I will go after anyone J2, unless the UK/ANZAC do something crazy on UK1/ANZAC1.