It wouldn't work. You could rotate so only one flock was out in the fenced yard at a time but if you put them all out there together the boys are going to fight.Yeah, I wasn’t sure how doable it would be to effectively have two flocks but allow them to run in the same fenced in area. They would have separate coops and enclosed runs but a fenced in and open ‘common’ area.
You might also have trouble with the one rooster and two hens setup.