I think the main problem with this suggestion is troops.

Germany just did not have them, the Waffen SS, where by 1944, made up mostly of conscripts. By this time there was no hope of the units recieving the young, politicaly indoctrinated troops that made the SS so formidable and the old veterans where being killed by combat attrition.

Yes the Germans had excelent weaponry, equipment and personel but in such short supply to make any hope of victory useless, by 1944 they where relying on stocks of weponry that was earmarked for reserve and garrison units.

Germany's only hope was make peace after taking France and by not invading Russia.