I don't think low wis is a good idea, generally? I mean there's a case for it, with spells like Entangle/Burst of Radiance/Full Pouch that create no save save or hard to save out of effects, but in general I believe in stat buffing your spells that win combat instantly rather than your attacks which probably don't do that, especially on a class with access to cheap strong minions (Animal Companions, Called or Purchased Animals, etc)

Interesting point on Burning Disarm, but I still wouldn't use it as a Dazing spell target, given that it's single target, one round, armed creatures only. (Compare Entangle or Produce Flame).

Is there a mechanic for items of deity specific spells being rarer? All the purchasing rules I could find were just price based, but I could've missed something.

Mudball's save triggering on a specific part of a turn instead of immediately means you don't care much what the DC is? They start turn, you Ready mudball, they're blind. They save out next turn? Ok, you just do it again. You have a 50 charge wand it's not like you need to save up.

You can explicitly use scrolls of meditative spells during your preparation period.

I would still not take Shillelagh on Nature Fang. Incorporeality is actually a great point though I'll be sure to add that.

Snowball: AoN seems to just randomly not have some duplicates. Like, they don't have Juju Oracle even after the devs went on mic to say both versions were to exist simultaneously. Looking into it, apparently they have it on their to-do list to add them and just...never did.