that is not entirely correct, in the case you describe i would go for a male super.
like a super pastel or super lesser or ivory or super fire.
this way you can still tell if the dinker does something genetic or not, because a super male to a normal female produces uniform clutches, and you can also check if it interacts with a known gene complex
EDIT: if the male is a very promising dinker its a different story. otherwise, breeding a normal male really does not make sense. breeding him into many projects in just one year makes even less sense, you could do that with a powerhouse 5-gene male instead.