I finally found the lunatics under the "secret eye" location, but I always knew about the faction at this point. I saw screenshots online about being able to attend a ritual involving the eye's defense system. I convinced the lunatic at the entrance to let me see their leader, but when I talked to Synethese, I could only do a Persuasion check, excuse myself, snatch his gem, or start a fight. I couldn't pass the Persuasion check, and the other 3 choices end up in a fight.
Is it impossible to witness the ritual if you already know what's "up there"? People were saying there's a bunch of extra dialogue too.
