Most of the ones i listed are pretty common, the white knights might be a little harder to find, but if you post on here that you're looking for all of those you should be able to find them no problem. I would worry a little bit with the rusties because they are so passive, but you could give it a try. 4 of each would be fine, as long as there's no conflicting colors or they'll fight for dominance and one will lose color