@Zhukov44:
The long-game KGF seems to require holding Persia and Poland, in order to gain and maintain the long-term economic advantage. Strats mentioned above like the Norway factory might help the long-game succeed (I’m undecided on this one myself).
I think a factory in Nor is needed by either UK or US. It just really helps, particularly if you need to add a ship.
Also, you definitely need Poland. This cuts off Germany and frees up Russia since both UK and US can drop units directly into Pol.
As for Persia, if you can hold it then that is great, but deadzoning it might be enough. If you can get some US troops heading through Afr you might be able to hold, but at least with it deadzoned you can prevent Japan from linking up stacks in Kaz.
I think you still should probably play Russia aggressive early, but come mid game you need to decide if you can get the ‘short-game’ KGF win or if a ‘long-game’ is likely. A lot of this will depend on the German army in Fra/Berlin and how much of a threat is Japan. If Germany has a monster stack, I start to pull back the Russians and gradually replace them with UK/US forces, while Russia defends against Japan.
You can survive a long time (even if Japan is earning a ton) by not letting Japan merge its army into one super army and by cutting off Ger/Ita in the East. While you are ‘surviving’ you need to find a away to eventually crack Fra/Ger or Blk/Ita before Japan can take Cauc/Kaz or Mos. Sometimes this could lead to tedious build-ups or marching through all of Europe but can be done before a monster Japan can take Mos.
I also agree that ftrs help, a lot! Both UK and US should have a heavy supply, you’ll likely have a few ACs so having ftrs shouldn’t be too much of a problem. I’ll routinely try to have 4-6 UK ftrs (or total planes) and at least 6-8 US ftrs (or total planes). I’ll add in extra US ftrs continually if game circumstances allow it. A couple Russian ftrs are also nice. I start to add those in if I hit the big NO or if I ran into production problems due to SBRs earlier in the game.