I just need to state this: I in no way intend to get another pet anytime soon.
What I do want to know is if Rankin’s dragons actually live in groups in the wild or if that’s just another myth that can have dangerous consequences in captivity. Like I said, I’m not even considering getting another pet, I’m just curious. I don’t even want Rankin’s dragons because they are super hard to find in the US.
Well, bearded dragons can be housed together too. It doesn't mean it's the most optimal for the species.
I've never had rankins, but I can't really find anything that states they do better in a group. And usually, that means they do better alone.
But, this is just based on my very limited knowledge on the species.
I know I’m 2 years late, but a friend of mine has their trio together. It does depend on the dragon, but they can be housed together. I personally wouldn’t suggest it as it can lead to disastrous consequence, such as accidental mating and injuries. Hope that answers your question!