…two Hetzers, one on Vossenack and two on Bastogne; they survife about 5 minutes
First of all, that would make three Hetzers. Secondly, if you play your cards right, it can last a lot longer. For instance, on Vossenack, I had great success sticking to the thick under-brush at the edges of the map ambushing enemy armour, and using MG on top to hit stray infantry. All in all, Hetzer lived long, happy, and productive life.