I think that Japanese TRN in sz59 is enough important also looking forward to a 10 round game.
IMHO it is more important than the Indian DD, so the best thing that the indian DD may do in its short operative life is to attack and sink the TRN. After that it will be utterly killed by a Japanese BB… Royal Navy is famous for winning the Wars not the battle.
The AC is not needed, 1 more die point is useless. We are speaking of a battle between a DD (50% of hit) against a TRN (about 16,7%). I and my friends play Revised by almost two years, and I have still to see the UK DD sunk by the Japanese TRN.
So AC and TRN may be saved. Having the Japanese fleet the need to kill the destroyer, Indian Ocean Fleet is almost free of doing whatever UK player wants. Usually I join them in sz30 with the SUB and TRN from sz40.
Moreover, if UK leaves sz35 Japan has an easy shot to India in first turn, and maybe UK fleet cruising to Europe will receive a lot of bad news from what happening in Russia.
In a face2face game of us, Japanese player conquered India and placed there an IC in J1. Good move in my opinion.
Regarding Buratyia usually we pull back all the infantry to Yakut. I think that leaving one there to be shot by a JApanese BB is not useful. I do not think that Russia should spend inf to defend Allied ships in Pacific that USA may replace if needed and UK do not care because almost useless.
This is also, as Trihero said, a move relly needed in multiplayer games (we usually are 4 or 5 players).
Because if Russia retreat then UK may attack or not the TRN in sz59. If Russia leave units in Buratyia UK must attac kthe TRN in sz59.