Hello Kali, and a belated welcome to BYC.
Unfortunately, you do not have enough space for your pullets let alone for an integration. I would work to greatly expand their space. I know
@Debbie292d stated 10 sq ft per bird for the minimum on the run size but IMO, that is just too small. It's just an absolute bare minimum that is quoted on this site by most members and really only works in small flocks with mild temperaments where the run is cleaned out frequently.
I agree more strongly with her stated 15 sq ft per bird for the minimum run area. Because your pullets are now raising a cockerel, you will eventually end up with fertile eggs and a girl or two (my vote is on the Orpington) will oblige to hatch some and then you will need room for the resulting little family. Broody hens and chicks need even more space. Then if you want to keep the pullets from the hatch... go BIG with the expansion.
The birds need not only lots of space but things to enrich that space like dry organic litter to scratch around in, perches (branches, stumps, pallets, discarded wood chairs or stools) to hang out on, places to hide from other flock members, dry spaces to dig out dust baths and sunny spaces to sunbathe. These are all instinctive behaviors that chickens want to participate in to make their lives as good as possible within the confines of a run.
Your cockerel is physically too small to take on any of the pullets to try to stop them from going after him. He will not develop the maturity to be their flock leader for a while. He needs to learn the ropes. The pullets are actually trying to teach him to give them space and be wary of them but he cannot get out of their personal space easily because they don't have enough space.
As for Titus's torn wattle, I would leave it alone now. Once you clean and disinfect the injury and the bleeding stops, you should just monitor, especially with the cold weather. You don't want to apply wet products to skin in cold weather. Wattles and combs bleed. A LOT. Your Orp got a hold of it and ripped it. It's not uncommon in situations like this.
Good luck with all your chicken projects and enjoy your developing flock!