I am digging a little bit more into the topic of allied devices/squads right now.
My understanding as inveterate Japanese player is that the Allies should brutally exploit their tanks until the last one gets blown up rather than upgrading to better ones immediately once available. I think the Valentine => Grant/Lee comes to mind but I might be wrong on the specific model.
Correct.
Also never sent replacements or upgrades to LCU's that will withdraw. They'll happily take it off to Europe and you'll never see it again.
In general, I am not fully grasping the entire InfSquads upgrades. I know for example that CMF/AIF squads can and should be upgraded, but how do I do that? IIRC there was the possibility to upgrade all the CMF to AIF with a relatively small pool of AIF.
If I'm not mistaken I should stockpile AIF squads until I have enough to upgrade a full division. Then, I just let every single division upgrade individually to the new standard and in few weeks/months all my Australian boys are no longer deseperate militia-men but rather furious AIF squads.
Am I missing something of the process?
I think Lowpe goes in to detail in his AAR.
The essence of it is that you divide your Australian divisions into A/B/C components and stockpile the squads until you have enough to upgrade a full component. Because of how the rules work, if you upgrade 100 militia to inf squads, those 100 militia go back to the pools and get upgraded to inf squad there. So over several turns you can sequentially upgrade units.
The AIF upgrade is slightly trickier as those squads are much more scarce. It's been a while since I checked but IIRC you may need to disband some units to get it in a timely manner.
Note that Australian squads have a very low replacement rate, so take care if using them widely.
Also, how do you approach replacements of Chinese InfSquads? Currently, I am stockipiling them and giving the Chinese just support units so that they "repair" more easily the infinite list of disablements they start with.
My intention is to stop any reinforcement to Chinese units as soon as I have few Chinese units in Calcutta and then turn just those on and let them fill up with infantry squads.
Is is a good approach to Chinese replacements?
Not in my opinion.
Chinese inf squads have a massively high built rate, something like 10 squads/day (that then doubles come 1943).
You want those to be getting on to the map ASAP, preferably into high AV units with good leaders. I turn on the replacement taps to units that are going to be defending key positions over the course of 1942.
Last, but not least, I am channelling all the British available replacements into the units defending Singapore. Am I doing something mad? To me, it looks like there aren't enough replacements in the pool to beef up troops in India and I want to have the highest possible AV count in Singapore before Omar crosses the strait. Since Indians&co are still repairing their infinite amount of disablements, I deemed reasonable to channel all the available infantry in Singapore.
What do you thing about this?
This is a mistake.
It will not influence the fate of Singapore in any substantial way, and the British and Commonwealth devices are some of the biggest pinch points for the Allies generally.
The British Inf squads you will need to keep around so that the British divisions (which will form some of your few combat effective formations in this region in 1942) can face sustained combat.
It is vital to note that a large number of the Indian divisions have British squads as part of their TOE, so British squads are also needed to enable these formations to keep a healthy TOE.
Over time more British Inf squads will be freed by TOE upgrades in Indian LCU's, but that is a concern for 1943. See page 313 of the manual for further info.
The Indian Inf squads you will need to fill out the divisions already in India.
Then there's the shared Commonwealth pool, which is anything from Bren and Vickers squads (both key components in a units firepower) to the 3 inch mortars, up to 25 pounder guns. This is the real pinch point, as they're used in British, Indian, Australian and New Zealand units so there is far more demand for these devices than will be met.
What's needed is a very tight control over what you get as replacement and via convoys, and appropriate assignment of the devices to formations that can take full advantage of it.