So, in Tharkold you have three candidates for High Lord, two humans and Thratchen. You have to wonder what's wrong with Thratchen in terms of other demons as to why they all didn't automatically support him over the "pav-scum monkeys."
Now, we haven't really thought about this in detail yet, but my first inclination is to emphasize that the relationships between dominants and submissives are more important than race.
The way it was initially presented, The Wolf seemed to almost be kind of Kranod's "pet," surviving and maintaining power in large part due to Kranod's protection. Not only is that protection gone, but the Wolf is part of the reason it's gone. Which is interesting. Jazrael as a ruler of the demon makes sense. She's shown herself to be fully capable of killing demons is the physical combat. Presumably Thratchen is much the same. The Wolf probably is not barring some as yet unrevealed information about him. Still, he is a politician in a Social 25 cosm. Perhaps as a Core Earth he's better able to take advantage of the advanced Social axiom for the purposes of manipulating the demons. He is, ultimately, a politician. Perhaps he regards the demons as just another constituency.
What do the demons want? Well, the obvious aside, what they need is a way to keep the Magic axiom of their cosm from falling below levels that allow them to exist. The Blasted Land's borders are very close to those of the Aylse realm. Suppose the Wolf launched an invasion of the Aylse realm with the idea of siphoning Alyse's Magic into Tharkold? That would be a boon to the demons even if it did plunge Tharkold and Aylse into war and jeopardize the Gannt Man's plans. Of course, the Wolf doesn't really care about the Gaunt Man or his plans. And if invading another High Lord is what seals the demons to him, that seems like a risk the Wolf would be willing to take.