I've always been a fan of the Do-335, and have read a lot of the history of the development and testing. As much as I wish it had been deployed in squadron strength and seen combat, it just was not to be. The Do-335 had teething problems, and there was the inevitable interference of the German military bureaucracy. By the time they were ready to go into production and deployment, the Luftwaffe had already decided that they were going full bore into Jets as quickly as they could. The first A1s as well as some of the prototypes of what would have been the B models were sent to Oberpfaffenhoffen in 1945, but by then the Luftwaffe was pretty much done. I can only find a couple of examples where the test pilots had to run from the overwhelming allied air cover, and nothing to indicate they ever shot anything down.
There probably would have been a limited production run of 335s if the war had continued, but the Germans wanted the Do-335 B models more than the As. There was also some development on hybrid designs using 1 prop and 1 jet engine, and some variants planned with turboprops and counter-rotating aft propellers.
The German rides are at a bit of a disadvantage in AH because the war for them ends in April of 45, and pretty much nothing new for them could be deployed in 45 with the lack of trained pilots, fuel, the destroyed transportation system, etc. etc. etc. I think there are a few things that they would have deployed if they could - things that I wouldn't mind seeing AH add, and the Do-335 is one of them.