This is what I am doing (and I'm not real experienced).
I have 7 standard hens and one standard rooster. I am chicken sitting 8 banty hens and one banty rooster. The broilers and 54 chicks don't count right now. Oh yeah, two ducks.
One standard and one banty just hatched a clutch of eggs each. They are in a separate part of the coop. All the rest of the birds free range during the day and come home at night.
The standard has chicks that are a week old. Yesterday I started letting them wander around for part of the day. No problems so far. Momma hen takes care of her chicks. They go back into the separate part of the coop for the evening where they have a nest box, food, and water.
The banty has chicks that are two days old. I put her and the chicks in a brooder box this morning because the big hen took a pretty big peck at one of the new chicks. It hurt to do it but I wasn't going to be home for a good part of the day.
So right now the hens with chicks are separated from the rest of the flock for the evening and part of the day. Big hen gets to range with her chicks for part of the day, they stay close to the coop. Banty hen is in a brooder box for her chicks' protection from big hen. Tomorrow I might give them another trial run at freedom.
If your roosters get along you could keep both of them but they probably will end up fighting. Banty rooster hides all day because he has been beat up so much. I want to give him back to his owner along with the banty hens.