intergrating 2 flocks, help

[Alaskan]

So nice when the chickens are happy.

 

[the43k]

Ok so I have a chicken area that is 44ft by 22ft, within this area I have the chicken palace (converted shed) 5ft by 6ft, a rabbit hutch and run, and a store bought coop/run, in the chicken palace I have 4 ex battery girls, and in the coop I have 2 11 week old cream leg bars, 1 10 week old lavender pekin, 1 7 week old lemon pekin roo, and 1 6 week old wc black polish, the 3 teenagers have been in the coop for 7 weeks, I introduced the youngest 2 to the teenagers around 3 weeks ago and they got on great, so when and how do I go about putting everyone together????? Any help would be really appreciated