How would you have executed the "Kaiserschlacht"?

Put yourself in the shoes of German commanders. It's 1918 and you've just accepted the surrender of Russia. This has freed-up ~50 divisions to be used on the western front. You've just dealt a significant blow to Italy and for the first time in "the war that will end war" you can focus all of your efforts on the west. The United States has already declared war but is months away from providing any real assistance to the allies. This is your window of opportunity to strike, what do you do?