Really liking the Wraith, but have some questions about mechanics:

Q289: Can a Wraith (barring a casting tradition that adds a physical component to spellcasting) cast spells while passively possessing something? If so, how would defensive casting/concentration checks/aoos be handled?

Q290: Do magical staves grant their caster level bonus while the Wraith is possessing a target?

Q291: How do feats and supernatural abilities that affect physical form work when possessing targets? Things like Shifting Disguise, Transformation, Fox Shape, or the Kitsune/Skinwalker supernatural change shape abilities? Technically even a passively possessing wraith would have access to all of these, but it seems like a murky area. Do things change across active/passive possessing divides? How would the Witchmarked drawback from the Illusion handbook function?

Q292: For the Unbodied archetype, how do they deal with magical items? Do they need to be in physical form to equip them?

Q293: Can the Spirit Blade Armorist archetype take the Object Ride Wraith haunt? They can possess targets, but only actively, while the object ride wraith haunt grants passive possession ability.

Q294: A Wraith with the Object Ride and Ranged Possession haunts seems like they could be spectacularly difficult to kill, as they jump to random objects without warning. Any advice for reducing that, whether through existing rules or house ones?