Follow the rules and you have a chance...
1) Raise the RBP from as small as you can get them, and with what you want to keep them with (slightly larger than the RBP). When raised with larger bully fish they tend to behave better (I had to be the bully one time...I picked on the fish for a month straight until it quit bothering the other fish).
2) Keep in a LARGE aquarium, so that everyone has their own space, territorial fights are always the start of the end.
3) Only feed frozen, or prepared foods (ground beef heart or chicken heart) free regularly (on a schedule) and remove any leftovers after 5 minutes.
4) When they are older try not to spook them, it insights them to riot.
Diligence, perseverance & Patience...Oh ya and a lotta luck.
In the long run, it's much easier to just give them their own tank.
Dr Joe
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