My reading has Christ’s died, the Merlin was holding onto LTW and Ebs proxies whilst in surgery, with the Gatekeeper at the Gates he held three votes out of five, leaving Mai and a badly shaken Martha Liberty. The Sprites display didn’t do Harry a favour in that respect with Martha.
Christos I think was Jim’s attempt at a Pratchett Wizard, and he was definitely being used by the Merlin as a stalking horse. He wasn’t Black Council, if he had been he wouldn’t have been in Chicago.