Abstemiousness is interesting, but rations are generally cheap and plentiful enough that stretching your food out isn't a concern. Like, I guess you could have a ascetic character who basically didn't spend money on food during downtime.
Air Bubble could potentially be useful depending upon the terrain you're in. Unlike Water Breathing, I believe this will let you breathe in a vacuum.
Ant Haul: Sometimes you need to move some serious stuff. Combine this with a set of Muleback Cords and a friendly Elephant, you can haul some serious stuff around.
Bless Water could come in handy if you're not basically guaranteed to always have access to markets you can get Holy Water from.
Divine Favor could be of interest if you like to fight.
Enhance Water is notable as it allows you to create not only wealth by turning water into some form of booze, but depending upon the kind of booze you can also make food with it. Like pints upon pints of kefir or kumis or even egg nog/rumboozle. So it can feed you, hydrate you, get your drink on for you, or even be a way to get some extra cash during periods of downtime. It's definitely not going to make you more powerful, but it is certainly notable.
Fairness is a spell for guaranteeing no party is screwing over another party during trades.
Hide From Undead can be useful, though it's more of a wand spell than a preparing spell.
Infernal Healing is the best out of combat healing spell in the game to put onto a wand.
Liberating Command can be pretty nice.
Murderous Command isn't half bad, but probably isn't quite worth a favored class pick like this.
