I didnt mean to replace all heavy bombers with mossies LOL,but they were very difficult to intercept,the germans seemed to be having trouble developing any useful a/c,their whole procurement procedure seems quite chaotic and riddled with politics (even more than ours !!),luckily for us they spent the entire war fiddling with a/c to try and make them suitable for some impossible specifications,imo they would never have been able to get enough high speed night fighters into service for that reason.
Istr that the mossie had a very high cruising speed,and I absolutely agree that the 'round the clock' bombing must have been a real pain and drain on the hun resources.