Build a smaller breeding pen coop... there you put a rooster with a couple hens and you can control your breeding. Yes RIR where impossible to find this year
Right now I have a mixed flock but we only plan to breed specific breeds... really depends on what meets your needs and goals.
We have bantams and standard sized birds... current breeds are:
Ayam Cemani
Oriental Gamefowl
Black Swedish (incubation)
Old English Game
Silikies
Sultans
Polish...