In general lizards are solitary creatures, coming together briefly to mate then going their separate ways.
Rankins are touted as being more 'social' and I've certainly seen them kept together in groups without problems, however, the majority of the posts I've seen on this Board regarding colonies, or pairings, have not always ended well. There are invariably dominance problems that lead to them having to be separated.
I have all of mine housed separately and they do just fine that way
Hope this helps.