I've owned gold banned maroons for yes there one of the toughest clowns other then maybe tomato clowns.
Either the maroon will for after the wyomings and maybe kill one if it does the second one will definitely be a goner. Or the 2 Wyomings will gang up on the maroon and kill it.
In my 300 I had a pair of gold banneds and a pain of percs. I also had 3 different types of nems 6 bta, 1 carpet, and a large ritteri. The GBM laid claim on all the bta but were deathly afraid of the ritteri. Well sense the percs couldn't go in the bta they stayed in the ritteri at all times. I believe the retteri was the only reason the percs could live in that tank with the GBMs. Let's just say it was an 8 foot tank and the bta were located by the overflow box and the ritteri was all the way on the other side of the tank. If those percs came out from that retteri the female GBM would fly to the other side of the tank to try to get the percs. She wouldn't go in that ritteri but she would sit out side if it and wait for the percs to come out.
This video shows the tank
https://youtu.be/twrYAAl8OlM