[Micah]

Cast antimagic, especially if Rlyeh's not expecting any astral mages and doesn't have magic duel scripted. That should help a lot with blood vengeance, and you can cast it easily with a skullcap and another booster (banner of the northern star held by someone else scripted to retreat is an idea, if you're tight on pearls). Any high MR troops are better choices here as well.