Maybe Wulf's plot involves trying to make magic available to everyone. This is heresy. He started out as a reluctant heretic because he loved the Triad but hated what they had become. Alnaar is trying to use their stronger magical resources to conquer. Wulf loves Alnaar, but he can't let this happen. He knows what happens to conquered nations.
A couple of little thingies. Should the mages get mail once in a while, from the outside? Perhaps when the supplies come in. (Not too often as they're pretty self-suficient.) They're allowed it because they're mages, and the prison has to balance what is allowed carefully with what is not. Better to let them have (censored) mail service now and then than to let them get cranky and dissatisfied. Giving in on little things can make the mages ripe for caving in to more important things. There should be a library as well, albeit a small ones. It consists of some magical documents, a few things shared by mages ("I'm done with this, you can have it"), plus stuff that was dug out of the ancient city but wasn't important enough to be saved as an artifact. (Wouldn't it be ironic if Wulf found his answer in one of these?!) Poetry, philosophy, ancient plays, even ancient novels! Adiran could be the librarian -- unless James Whitmore is available? ;-> Hmmm, Adiran and Jupe as a couple?... Wulf can surprise people by revealing that he knows a little Cavan. He can teach himself to read Alnaarn, with Wulf's help, over time. Maybe he can find clues as well. Speaking of Gorok, it would be sad if, while he was in prison, he got mail -- a letter revealing that a kin he thought dead was found alive, except that she died soon after she was discovered. :( I'd better be careful, or Gorok will borrow one of Wulf's whips and come after me.