I'm trying to find a hopefully exhaustive list of all of the potential methods for increasing the number of spells per day a Sorcerer (or other spontaneous spellcaster, but I'm mostly interested in Sorcerer) can cast.
In previous editions and other flavours of d20 games there were quite a lot of options, but now in PF2e I can only find the listed options below:
- Ring of Wizardry (restricted to Arcane tradition only)
- Ring of Counterspells (arguable, kindof a spellslot but very limited)
Have I missed any? Is there any listed quote or intention as to why spontaneous spell casters get what appears to be so few of them, and even LESS for non-arcane casters? (might be off topic, I admit, but if you're not arcane you get basically staves and that's it?).
I'm not counting Wands or Scrolls or similar "use this and get a specific spell" items as part of this question, as they don't require or benefit you specifically as a spontaneous spell caster.