Meta theory;
What if Cantata is just an extra-long D&D campaign that the Viatica cast is playing? If you ask me, this makes 100% sense and I assure you, it is PERFECTLY logical.
(Yes, I am aware that the AF Edition isn't technically canon, sue me. I'm not crazy, you're crazy :])
Crazy? I was crazy once. When they locked me in a room. A rubber room. A rubber room full of rats. Rats make me go crazy. Crazy? I was crazy once. When they locked me in a room. A rubber room. A rubber room full of rats. Rats make me go crazy. Crazy? I was crazy once. When they locked me in a room. A rubber room. A rubber room full of rats. Rats make me go crazy. Crazy? I was crazy once...