Yeah, the method I talked about (some other thread) mentions you do a “normal” J1-3 and set up for a go about J4. There are several things to consider before you even start, first and foremost if the US has any naval presence in the Pac, forget it. You should wait until the US BB hits the Eus sz before you even consider and I think waiting until it goes to sz 12 or UK sz helps even more.
Also, you need to be able to look about three turns ahead and determine if Russia is takeable if you continue your push. How did Ger do in Afr, are they already boxed in by turn 4? Etc.
I think a very standard J1-3 can both be effective should you decide to make a run and be well disguised.
J1: Buy IC (for Man), trns. Attack Chi and Pearl, (Bury if empty)
J2: Buy trns and inf. Attack Sfe, Bury (possibly Sin or Ind if empty)
J3: Buy inf, rt (or arm) - maximize your cash. Attack Sin and Yak, unload troops to Bury.
(make sure you have about 5 trns)
I would consider this probably my standard opening right now, and nothing should spell attack on US. And should the US have 8-10 inf in Wus, 8-10 inf in Wcan and 8-10 inf in Ecan, you simply continue with your push to Moscow (or branch to Afr, etc.).
Now on J4 you need to calculate the optimum buy (for use on J5 and beyond). Probably a trn with the rest inf. You should safely be able to fortify Yak and Sin, then you transport your 8 units from Japan (2 units from Bury) to Ala (split landing between Ala or Wcan if US is light on troops or was just placing in Eus).
Now you non-com the 3 units place in Man to Bury, move your initial arm and rt to bury, Bury units to Sfe (or keep just keep in bury).
On J5 you should easily be able to attack (possibly reinforce) Wcan with 6-8 additional units (total 16-18 inf 5-6 ftrs, 1 bom, 2 bb-shots) while still placing 3 in Man and possible sending 2 more inf to the Mainland while setting up a shuck of ~6 inf to continue to go to Wcan while maintaining your defensive borders at Yak an Sin for another rd or so. And at that point if you have to fall back you may be able to pick up Cus (or Wus) as a trade.
You can also pick up HI on J5 with your J4 purchase (that is why you need to plan it out carefully). Once you hold Ala (on J4), the US is looking at 5-6 ftrs, 1 bom, 2 bb-shots everytime they defend or retake Wcan, And they have to make sure they can defend Wus as well from a direct landing from Ala or the trn at Hi heading to the Mexico area.
This is why, as the US, I’m a firm believer in starting your shuck immediately from Wus on US 1. Eliminate the threat from the start.
I’ve tried the Japan attack twice - once was a desperation ploy and waaaay too late although I had a little success and one time was more effective but I didn’t purchase the right stuff on the previous turns, I was going against a US Pac strat, and couldn’t follow-up do to poor purchasing and non-com moves. I did however take Cus and hold Wcan for 2 turns but in that game Germany was in real trouble as well.
But these attempts have helped me work out some of the bugs and recognized when it may be possible and when it may not, and why I’m fairly certain it could work consistantly given the right circumstances and b/c you never do anything to commit to it until J4 the worst case is your J1-3 moves are still great for going after Russia.