I don’t think I have ever build an IC with Germany in AA50.
The biggest advantage of a need for more than one German factory, is the fact that Germany is making lots of money, and Russia is not, and hopefully for axis, a strong Germany and Italy means also a weak UK. This advantage of high income, is very powerful in itself, you don’t necessarily need to place 16/13 German units to win the game.
With axis, I always hope to hold Kalia, but this is mostly b/c of the extra money using NOs, not the IC, although almost all players who can keep Kalia with Germany buys 12 units, and place 2 in Kalia, but this is not the same as a need for Germany to build any more factories than the one it starts with.
Some other aspects; if allies can keep France secured, it’s usually game over for axis.
A navy strat with Germany is generally suboptimal, like it is in revised. If Germany can afford this in a dice game with no bids, it’s b/c axis are slightly favored.
If Germany can get all 3 NOs for several rnds, Japan should be reduced or allies looses the game.
Germany can’t keep an IC in Norway if allies don’t want it.