Now is a good time. I am not a big brooder fan, so I get mine out ASAP. But a lot depends on your set up. So before you do it, take a look at your run area, are there some hide outs, some places where a bird can get out of sight of other birds. That will really help. Set up two feeders, and place them so while eating at one station, a bird can't see birds at another station, even a 3rd station can be helpful so that everyone gets something to eat.
Then is you can add a lower roost, off to the side in your coop. Some coops you can do that, some you cant. Another trick is to tape cardboard so that it divides the roost into two parts, so that a bird on one side of the cardboard cannot reach a bird on the other side.
But I think the most important is to pull your established flock out of the set up, and lock the new birds inside the set up. Some people put the older birds in the brooder, some people just lock them out in the yard. This lets the new birds explore the area without being chased and pecked. It sounds crazy, but I think it is helpful for the old birds to see the new birds in the set up. Let the old birds in as close to dark as possible. The urge to roost is generally stronger than the urge to fight.
But mostly just do it, and get it over with, the less you interfere, the better. Each time you separate them, you basically start over. Some people get a good powered squirt gun, and sit out there, and when an oldy chases a newbie, they get squirted. If there is no blood let them be to work it out. That is were a hideout is nice.
And lastly, often times there is one or two bullies, that won't give it up. If so, put them in the brooder box, and let the rest figure it out. When they are pretty calm after 3-5 days, then try the bully back in.
Mrs K