You are joking right? Until recently the Zuma didn't HAVE a CS advantage, at least not compared to realms like Astrum. These large armies are a recent thing.
Get OVER the idea that the Zuma are the antagonist of the island. They might be that is true, but their is nothing to suggest that actually is there role. In fact if we look at how things have panned out recently it would appear that they are more a resource for canny player antagonist to use, with the associated risks if you don't approach things correctly.
This is the interesting thing of the Zumas indeed. They're not the regular Daimons from pop culture (comics, movie, etc).
They're a localized force tough, in East Dwilight they don't play any role and this causes a "shift" in players' experience on Dwilight.
Poll