[Wrana]

Well, closed borders, of course, mean that 'order dominion' pays off better...
Considering the game itself - you should note that one of its authors has a degree in folklore & the latter contains an experience of many generations who lived through many different situations. Of course, using actual myths, etc. for framework could be better, but Dominions, while being free with mixing and changing, is very good in being true to spirit of them - one of the things I love it for...