Hi,
Yes, I got a few more from other reefers and my tank now dominated by them. Suffering the same fate as you.
Any other fish I added in will be bully by them.
So, right now, in order to introduce any new fishes, I've to catch all of them and isolate them in a pail for 3 to 4 days. Brain wash them, so that they forget about the setup in the aquarium. This is because, by rescaping, that's still a limitation of what you can do, because the fishes have memories of their environment. Re-introduce them into the tank and let them establish their own territory again.
Well you have a nice setup, rescaping to catch the demselswould really be a waste.