Hi
To be honest I think you need to consider downgrading some of the troops to Volkssturm & Hitler Youth. Heres what Wiki says about the pocket
"Facing the Allied armies were the remnants of a shattered Wehrmacht, a few SS training units, and large numbers Volkssturm (militia units for aging men, including some World War I veterans) and Hitlerjugend (Hitler Youth) units, composed of boys as young as 12.
This was the end game for the ***. Maybe the Panther could be hidden in a ruined building as a static ambush? Or the Hetzer? I would consider maybe the halftrack being broken down and it being mended, possibly the hetzer/panther towing one another? You need to show that its the last gasp for these guys!