Video gaaaame
I end up visualizing a lot of my stories from the same universe as a more serious version of Mario & Luigi/Paper Mario or a similar type of JRPG, for the engaging nature of the magic system. It's a pipe dream but it would be cool to adapt Splitting Image and the rest into games, with new content and bosses to adjust the slower parts of the story.
In Splitting Image's case, the party is 5 characters but only 3 can be used at a time, greatly favoring Mortimer because he'd be the only one with the ability to parry+counter attacks and not just dodge. However, the drawback would be that he can't gradually recover MP like the rest and needs to use draining techniques or convert HP into it once he's out of juice, unless there are recovery items avaliable.
I also keep thinking of superboss situations when it's literally never going to be used in the comic, but hey the imagination has to run wild