I find sz 109 to be the hardest because 4 allied ftrs can scramble to defend. Your opponent needs to be considering which of these engagements he can win and scramble there.
Because of this I have been forced to consolidate my attacks as Germany. Hitting the English channel bb and hit the subs off Canada. Perhaps I need to be going after that ca off Gibraltar though instead. It can operate in the Med immediately.
Also, considering you are sending 4 Mech 1 arm(or 2) to SFrance, that leaves you with 6 inf, 3 art, 4 tanks against 7 inf 2 art 2 arm 1 ftr in Paris.
Thats 13 attacking units vs 12 def, and you only win that battle 59%…a battle for FRANCE! Now, you could add another inf(I saved one to block the UK blitz on Belgium, if we add him it bumps the attacker up to 73%. That means 1 out of 4 games you lose on G1.
Now you see why I asked for the ‘how’ on your strategy, you’re trying to do everything, creating a lot of low odds battles. Every low odds battle you add to the mix increases your risk that the turn goes bad.