Ukraine requires that you put tanks at risk on counter attack (unless you get a lucky strafe and can pull them back to Caucasus). Ignoring Belo makes it easier for G to stack center/north. I’m not sure which attack I prefer. Sometimes if I feel like gambling I will go Ukraine, but I’ve been burned there. An infantry or artillery bid in Caucasus can help make an attack/strafe here more powerful. Or allow you to go lighter with tanks (though I’ve been burned doing that too.) An infantry or artillery in Karelia can set up a Baltic attack, or an easier Belo blast. I think 2 attacks at most (W. Russia + one other territory), 3 is pushing it to the breaking point.
The only advantage I see to the Bury stack is to keep the Japanese transport and tank occupied, so it only seems worth it if you are going to go all out against Japan with UK and USA. Otherwise that’s 12-15 ipcs worth of Russian infantry that just end up getting killed immediately, and 3 ipcs worth of land left exposed after Japan takes Bury. Unless you are putting the pressure on J from all directions, it’s pretty easy for them to crush Bury and still manage to push out in the second round. Alternatively they can just stack Manchuria for defense (unless Russia does wild things landing fighters in reach of the far east) Japan might just opt to ignore the Bury stack and focus on China or the Burma push. Sending a Russian inf from Kazakh to Szech might be the difference between keeping those American units alive into the second round, or just allowing Japan to kill them outright, regardless of what happens in Buryatia. I think Bury has more to do with setting up the Pacific campaign than the mainland campaign. For the mainland its probably easier to pull around to Evenki and then drop south with tank support, while India just stacks.
It might be possible to set up a more effective Bury stack with a bid focus in the far east. The most you can bring into Bury itself is 5 inf and 3 fighters + whatever you bid. There are two Russian territories adjacent to Bury, so potentially 8 ground after non com, covered by the fighters (that’s putting everything possible into the territory, both Russian fighters and the British fighter, and probably bringing the Arch tank to Yakut to max the attack threat.) Against that Japan might not have enough to take Bury at odds, but they can certainly still defend Manchuria against an R2 attack with a pretty sizable force. It would allow a quick transit of USA fighters, or potentially British fighters if they landed in Arch. If it was possible to stack Bury for multiple rounds it might start to have an impact, but it’s the second round defense against J that is going to be decisive in that case. I think the max you could pull off for a round 2 defense, (if you bid ground and sent every air unit on the board to Bury) is 10 inf, 3-4 armor, 1 bomber, 7-8 fighters. But G would likely be hammering you on the eastern front. I’m not sure, I’ve never seen it play out with a bury stack at that sort of nuts commitment hehe. I suppose one might be able to bounce the fighters out of Bury after holding it for 2 rounds, flying directly to Moscow for a defense. Like just inviting a major German advance way earlier than normal. Not sure if there is some way to exploit a move like that as Allies. Seems like you’d have to at least try to take W. Russia light if you were attempting a throw all tanks east type plan. But G is powerful from the first round, if Russia doesn’t check them outright they can just launch forward everywhere.
I’m not sure that the advantage on stalling J would be worth the effort putting yourself at risk from Germany. Unless the idea was to draw an early attack on Moscow just to set up in Asia or the Pac with USA, a true American Tokyo endgame with the full commitment by all Allies. Going all ridiculous against Japan with everything, also leaves Egypt open unless you bid an inf there, so you might be down another Brit fighter trying to pull off bury 8 inf deep. This is all just musing in bid speculation.
Also, very important to consider…
A Bury stack requires that you kill the transport in sz61, which drops the odds on any sz 37 attack, or else allowing 2 Japanese transports to survive really seems to defeat the whole Bury play. On the low end, bidding nothing in the far east, and just leaving 1 inf behind might be enough to keep Buryatia out of Japanese hands, if you have enough in Yakut to threaten counter attack. Or a smaller 3-4 inf stack in Bury, might give you a similar effect tying down the Japanese battleship and transport, but without having to risk all 5 Russian infantry in the process.
A 5 Bury stack might work in conjunction with other bids, like a hit on 37 with a sub, or a Borneo play, or something that splits Japan in more directions than they can handle. As the British, or American player, I would feel obliged to triple team Japan, if the Russians threw their far east troops into a forward position. Bid-wise, perhaps a single Russian infantry unit might make the Bury stack a bit more intimidating for Japan. This all assumes dice. In LL a stack of only naked infantry is much easier to crush, so whether its 5 or 6 inf in the stack probably wouldn’t matter all that much.