About the Muse of Mind and Hivemind... Wouldn't the Muse be more likely than the Lord to pull it off? Hiveminds doesn't opperate for the benefit of any one individual, not even the Queen, being always oriented for the good and spread of the group as a whole. One would have to be pretty selfless to go ahead with this, no?

It heavily depends. If that is your thinking as a Muse, a Muse of Mind would definitely pull it off, but making a Hivemind inherently kind of destroys people’s agencies and ability to choose and think for themselves, which to me personally seems rather selfish.