My Anzac suggestion:
A1:
No purchase, Save 10.
Take DNG with 2 Inf on TT.
NCM 3 Ftr to DNG
NCM 1 DD 1 CR to SZ45
Collect 10 IPC
A2:
Purchase AB, Save 5
Retreat TT to SZ54 (UK will send its BB with it)
Place AB on DNG
Collect 10 IPC if not at war. Collect 15 IPC if Malaya was taken, else collect 20 IPC.
A3:
Purchase 1 NB if not at war.
Purchase 1 NB, Save 5 if J2 took Malaya
Purchase 1 NB, 1 TT, 1 Inf if Malaya was still under Allied control
DOW on Japan if not already at war
NCM TT from 54 to DNG, drop off 1 Inf, 1 Art
NCM DD and CR to DNG
Collect either 15 (Malaya lost to Japan) or 20 (Malaya is still under Allied control).
Note that a US1 purchase of a NB placed on Johnston Island gets the entire US fleet to DNG at the end of US2. The opportunity cost is definitely going to be either a BB or CV from the US1 purchase plan you have, but if India runs its BB to Queensland on I1, it can join up with the US fleet to make up for the lack of BB.
Further, with J3 looking at full Allied fleet at DNG with 3 Ftr scrambling over it you create plenty of situations for Japan to contemplate. You can reach a Jap fleet off Calcutta on US3 if you please. You can reclaim the Philippines on US3 and reinforce your fleet there with a Anzac Ftr landing after you take it. You can reinforce the US landing on the Philippines with 2 Inf from Anzac later or you can use the process I described for Anzac to shoot units all across the mainland. Anzac can even try to take/take back if Japan took it and still land its 3 Ftr on the Philippines.
The US or Anzac can take the Caroline Islands as well if left lightly guarded or even send 2 Inf, 2 Art and its fleet to fun places like Kiangsu or Kwangtung and remove a VC from Japan as early as Round 3/4. There is definitely something fun about the US landing 2 Inf, 2 Art at an undefended place, then Anzac reinforces it with 2 Inf and 3 Ftr in the same round. Especially when you consider the next round the US can get an IC on it and shortly thereafter Anzac is reinforcing that landing with more Inf. Whoops, an IC on China mainland held by the US on Turn 4 AND there are 6 ground units covered by 3 Ftr?
Something else to remember in your grand scheme of things: If Japan does attack Russia and decides to put some TT or lightly guarded fleet in SZ6 your Bombers can reach SZ6, hit those ships and then land in a Russian controlled Buyant-Uhaa. Of even more interest is that if you do take a place like say… Kwangtung, the next turn the US Bombers can reach SZ6 and land there as well. Japan probably won’t see that coming, I sure didn’t.