Strangely enough the North probably benefitted from being more unified and from being more divided than the South. Nothoi, Old Grehk, Sint and Thalmarkin were already fighting together, everyone basically considers Soren a good guy and that just left Fronen, who were understandably keen to get inside the tent. So obviously there was the structure for an alliance. But at the same time, if anyone broke the united front, they were going to have five very angry neighbours. By contrast in the south there's two sides that will inevitably clash.
Anyway, as I see it, we "just" need to hold out up north for long enough to work out how to go on the offensive. Has anyone actually managed to get their hands on an artifact yet?