I just did a few minutes of looking, I should have some more ideas later but these are my first thoughts about the intersection of Bausas' abilities, goals, and situaion.
He has a bunch of healing rituals, he could develop some non ritual healing spells with sun duration to use when he doesn't have time to do a ritual (of course he already has cessation of suffering which does a similar thing).
He could learn an arcane tunnel that has sufficent capcity and duration that he can cast healing rituals through it, after all Janus is developing magics to track redcap health and we've got a ship sailing for arcadia in the north African desert. (He already has leap of homecomming which would accomplish the same task for the ship, which I'd presume we'd AC's for but if not the arcane tunnel spell, perhaps a seven league teleport spell so that he can quickly get to locations he doesn't have an AC for.)
We had discussed something like this in the thread, but how about some way to monitor nearby towns for the presence of disease and some target boundary spells to eliminate disease when it is detected.
Thinking about the ship again would a spell to prevent seasickness at duration moon be lower than level 30 (so it does not warp)? or how about a device that ameliorates the effects of seasickness, can that be level 29 or less?
Planning for investigation of the enigma considering the path of the body, how about a spell that creates in Bausas' imagination (imagination in the sense described in Art and Academe) a depiction of his own mind and another spell that creates a depiction of his body, then he could observe how perterbations of one influence the other. Or, he could make them at range touch and run experiments on someone else's body and mind. I think that this sort of real time VR display of conditions would serve as a realia (from covenants) for investigating the path of the body.
His Creo mentem total is excellent and he's soft hearted and worried about apt actions. He could make a Creo mentem spell (or two) to prevent the onset of violence, by creating incnveinient thoughts or emotions in the targets. (I can think of several ways to do it, I don't want to push you in any specific direction).