Thoughts on Uranus SS variant?

[Grrr]

I'm playing Fury as the Axis in one of his games. And it's not looking good. I decided to make a disciplined withdrawal from Stalingrad and make a run to the southwest. Unfortunately, Fury's dogged advance has all but destroyed my northern wing, and the South is starting to buckle.
At this point, it appears that there's very little I can do to avoid the inevitable envelopment. In fact, it's very likely, that many of my units wont even make it to the main pocket. And, what forces make it into the main pocket will be worn down and decimated. It's not looking like the SS are going to have anything to rescue.