[alexti]

What I've often seen in the test is the heat scale appearing in the summer (ot cold scale in the winter) and then disappearing the next month (still in the summer). And I think (can't recall for sure) that in low dominion test, the scale stayed for longer period more often. Perhaps the scale is getting pulled off the balance with a certain probability and in the next round it's getting pulled back by dominion?

Only pale ones are cold blooded, and I'm not sure that anything but Oracles of Ancient are worth recruiting (unless you're waging underwater war, but in the water temperature scales don't affect fatigue AFAIK). I don't like pale one's poor att/def skills (they are even worse than their human troops).