Slitherine

Is it even possible to win as the Axis on the bitter end and if so any tips? I typically get a unit off the map to the northwest (great way to waste a panzer unit!) and get three strong units into Bastogne with support, and a fairly strong line between Meuse and Bastogne, and then boom - in roll unstoppable allied replacements and that’s me hammered all the way back to the starting point. Every time. And it’s boring. I don’t want to keep winning as the allies so what can the experts tell me about ways to win with the Axis? Thanks