I am going to say that it may work for a while, but one day all heck WILL break loose. How do I know? I did this set up.. but in a 180.
A male Midas, a male Jag (submissive), and a male festae..
All lived fine for close to a year, all grew up with other fish.. Then one day my midas killed my jag, and then a week later the festae. He's now occupying a 180 all alone. He also doesn't like female fish either.