Ok, my take on integration is very different and I don’t know how well it would work with your arrangement. I have a lot more birds, flocks of 10+ in 6x12’ tractors with 3x6’ roosting boxes and about 3x3’ of that is actual roosts. I slip new girls in at night onto the roosts and make sure to let everyone out very early the next morning, generally that is it. I minister and make sure there’s no bloodshed and let them sort it out on their own from there. My integration of the 8 newest rescues into the free range flock essentially was the same, with a couple nights of showing them where to roost, and now they are settled in nicely.