Warriors of Dathomir

You know im not sure why these four didn't come together, mother talzin the one that would help them through the clone wars. You would think that she would try to get the 3 of them together and then work together against Dooku and sidous. I mean Maul and savage managed to take control of the criminal elemental of the galaxy and even managed to get control of mandelore. With that and dathomere they become a threat to republic and separatist. Maybe even Sidious himself as he did fear the nightsisters and wanted them exterminated.