Hetzers are IMHO the absolutely best tank destroyers the germans have in CMBO.
In one QB versus the AI, a single Hetzer destroyed 2 Churchill VIII's in two turns.
They both came into its view at the same time and they shot at each other for a entire turn, neither side got any penetrations.
In the next turn, the veteran Hetzer crew first took out the gun of the first Churchill, knocked out the second one and then turned back to set the first one on fire.
Since then, I've always taken at least two of these cuties to all of my PBEM battles.