@tin-can-of-the-sea
Hey Tin
The only 2 nations you’ll really be buying mechs is Germany, as you mentioned, and then the UK.
Germany is self explanatory, you’re more than likely going to buy some mechs for fast movers to support the tanks when trying to rush for Stalingrad.
The UK will more often than not be buying lots of mechs due to the vast size of their empire. It takes lots of time for infantry and artillery to go from S. Africa to Egypt or Egypt to India and sometimes you might now always have the transports you need to transport large amounts of units from point A to point B. A common place where mechs can be produced is Persia where you produce them there and they have the potential along with any mobilized tanks to move 2 in any direction and be in Egypt or India or Stalingrad on the dime instead of slow moving infantry.
As for everybody else, Italy won’t be buying mech, America as well won’t be using mechs much, Japan could use mechs for crossing Southern Asia and China but that isn’t very cost effective for them since UK Pacific and China don’t fight with that same effectiveness as well as the uselessness of mechs on islands. THe Soviet Union could buy mechs but that’s only in the mid to late game when they’ve got the Germans on the run.