glad to see someone putting that idea to good use! i’ve also found that 5 INF, 2 ARM, 1 ART = 8 units for 29 IPCs is more effective than 4 INF, 4 ART = 8 units for 28 IPCs (if you can get the extra $).
Instead of art I try to buy as much armor as I can when possible.
I also like the allied “blitz” idea to take Ger as fast as possible within 8-9 turns. Recently I’ve been experimenting using Soviet to become part of the attack. Let’s say, in the example as described over, that Ger has 50 inf. + tanks and fighters and USA and UK have no chance of taking it. With 8 inf, 8 art and 2 fighters from Soviet it’s actually possible to take Germany!