Let’s look at the OOB Paris rush + naval buildup in a vacuum, with Low Luck for consistency.
Round 9 result: G: 2 inf, 3 art, 1 fig/F: 4 inf, 9 art->G: 14 inf, 4 art, 1 fig/F: 16 inf, 9 art (R10 beginning)
So while you may be just starting to overwhelm Paris, it’s taken you 10 rounds to do so. And one of Italy or Russia should be doing very well since Austria can’t hold them both off and the Ottomans’ full attention is on the Brits (since all of Britain’s money is going to India because they can’t get across the channel), and Germany had to stop buying navy R4 to make the seige of Paris mildly successful, so America’s navy (that they should be focusing on with all the German ships built) should easily be big enough to push the High Seas Fleet back into port and allow Brits across now that the Ottomans are no longer a threat.
First of all, the Deutsche army should have virtually all of their forces in one place by the time they reach Paris. With a higher attacker/defender ratio, the defender tends to lose all of its units in the first roll, and the attacker loses relatively few. It is extremely efficient. I march into Paris in 5 turns, and completely capture it the next turn. There are usually about 10 infantry, all 15 initial artillery, and a couple fighters left over in the end.
Once again, this strategy has been successfully tried numerous times.
So is Germany sending about 40 IPCs at France or building 2 battleships/turn? 2 battleships leaves Germany with only a piddly 16 IPCs to send at France, which will barely outmatch them even when Paris is contested. But if they don’t build those ships, Britain can send troops across the channel to help France out.
Clarification: The ~40 IPC’s worth of units that Germany sends is each of the initial “waves” of infantry it had in the beginning. Therefore, it is not buying any land units except a few from the leftover IPC’s. Instead, it is predominantly purchasing battleships (and lots of those). The British have no choice but to surrender their waters.
Side point: I prefer to use the Ottomans to simply send all Bulgarian and Turkish-produced forces to Russia. They do not need to survive (pessimistic, I know, but I care for the good of Germany much more). Also, by attacking only one territory on a front at a time, the Austrians can lose very few units, too. This strategy has also been experimented with, and enabled Austria-Hungary to hold Italy with its Tyrolean, Trieste, and Bohemian armies, while the rest challenged the Ukraine. Even if Russia is able to hold off the Austrians (which is unlikely), the Ottomans easily side-step to Tatarstan, and threaten Moscow.
My only question with this “snowball” strategy is: what is France doing while you’re combining all of your troops into one territory? Why wouldn’t they just go around you and drive through high-IPC areas like Munich and Berlin?
Same thing as if they went into the “Scorched Belgium” Trap: If one or two infantry side-step, send 4 or 5 to stop them. If a larger French army does this, annihilate it with your whole force.