I would like to suggest some kind of rework of the Black Knight so that the production of this unit would be more viable.
Currently we can make 5 units for each castle built (8 if you level up with Elzback), that is, we do not see this unit being used, except in some FFA or very low level.
I do not mind if the unit would have to have its stats reduced, to be unlocked as a normal unit of age 4.
Currently its use is a joke.