I don’t think it matters a damn.
The whole problem with this game is that the Allies are so much more mobile (they can virtually teleport by sea, and can feed units into the East via India) that whatever the CPs do the Allies can immediately and effectively counter-move.
Only by allowing the CPs unlimited land movement by rail do they stand a chance of winning.
i don’t agree, i have played 6 games against the same people and won 5 out of 6 games. You can win as the Central Powers. We opted for different opening moves which stunned the Allies every time. You can’t go for a total victory but you can hang on so they give up. Taking Russia and moving all west is critical.