I’ve done some fairly successful KJFs in that I can diffuse Japan well enough with a hardcore US navy, but the issue is always always that Germany is very strong by the time that happens, and Russia is on the verge of collapse.
There is absolutely nothing you can do to prevent Japan from offloading 3 full rounds of troops into Buryatia, that’s 12 inf 12 tank. That’s hardly easy for anyone to beat considering Russia doesn’t nearly have the troops to spare, and the US and UK are light years form being able to build that many troops there. That means Russia IPCs collapse entirely from the East while the Germans press hard from the West, and soon you have an 8 IPC producing Russia.
Germany happens to be vastly annoying without the US to perform its support role. The counter to KJF is usually to kick the crap out of Africa as Germany, and force Russia into large troop trades in deadzones while the Japanese unhindered still drop massive troops along the north. The UK solely has to deal with a possibly massive German fleet while maintaining an IC in India and attempting to liberate Africa, and land into Europe as well, because the US is very busy attempting to build the fleet it needs to beat the Japanese. It’s a burden no matter which way you slice it.
I’m hardly one to pass complete judgment on a strategy like this; many strategies that I used to think were dumb actullly have some merit to them once re-examined. But I’m pretty sure that Germany is monstrous in this circumstance and the UK can be stretched too thin doing too many things, and certainly a clever Japanese player can strafe the transports out of the US fleet which prevents the island hopping, all the while the Japanese can be making more than the US is.
My $0.02 if you’re going to KJF is always to reinforce the Pearl Harbor fleet with the Indian fig because it potentially either causes tons of damage to the Japanese or saves the entire Pearl Harbor fleet, which is an efficient move. And of course kill the Kwantung transport. Past that, I’m not positive on what are the best moves. An Indian IC is helpful, but on the other hand you may not have that option available if the Germans link a massive fleet together and get into Africa fast, since you’ll need all your scarce dollars to whip up airforce and navy to handle that.