Both of those are too small for all your birds.
Might think about turning the gable roofed coop/run into one large open air coop by removing coop wall on run side and maybe siding the back in solid...put long roosts up.
Can you add a large secure run that has access to both coops...give them...
How big is this coop, in feet by feet? Pics would help.
So you have 8 PR that are 12 weeks old.
6 Bantams (4 of which are roosters) about 8 weeks old.
....and another 6 bantams that are how old?