So the caster dedication feats have a bit of text that reads "You can use wands, scrolls, and staves, but only for spells of a spell level you can cast." Does this refer to spell levels you can cast through your multiclass archetype, or spell levels you can cast at all?
To illustrate, let's say you are a 10th level cleric who took the Druid Dedication. You get a standard staff of fire, which has up to third level spells.
1) Can you just the use staff at will as a caster with 5th level spells? Or can you only cast the cantrip since that's the only primal spell level you can cast?
2) If our caster took Basic Druid Spellcasting, they could definitely cast anything from 3rd level or below from the staff, right?
3) Can you convert cleric spell slots into fireballs through the staff?
4) If the answer to 3 is normally no, what about if you use Trick Magic Item?