No, no, no going for seven in Heth, its essentially a Theocracy with everyone worshiping Xarr. I suppose that before Xarr's rise that might have been the case, but I prefer to think they worshiped an array of gods with none having a really firm foothold. I don't think the concept of the seven necessarily needs to mean every religion has a pantheon of those seven alone - to me that would be quite dull - you might have a hundred gods with several in common with neighboring nations, etc. Some gods might be almost universal, etc. I'd also imagine there are other nations which are monotheistic, etc.