The Shalrune race seems to possess enormous endurance. Why aren they ruling the land, since they seem to be so strong?
Keep in mind that the Shalrunes don’t want to rule the land. If the Shalrunes had the aggression and arrogance to match their stamina they could very likely take over the land, but they are not an ambitious race. They practice magic and study swordplay as a means of defense, and they don’t consider the best defense to be a good offense. The Shalrunes attack no one unless they absolutely have to. Consider also that high endurance does not make the Shalrunes invincible; in Storm Watcher the Shalrunes of Makar are attacked in their own village and many are defeated — and by humans, no less. The Shalrunes would rather live in peace than try and conquer other races.