quick chiori impression / tldr
Chiori essentially is Albedo x 1.5 (or 2)
She has a dependency on the presence of a Geo Construct to summon her 2nd turret, this may be problematic for Navia unless you play Triple Geo
However, her unbuffed damage with Harbinger of Dawn = Spindle Albedo Buffless
AKA The dependecy is technically not much of a problem especially if her Elemental Skill Snapshots any ATK Buffs (it likely does)
it'll be weird if your party order actually matters with this character, but it seems to at a glance
her burst is most similar to yae's, meaning, don't build for it, use it if it's available
Sets
4GT BiS by far
Chiori has atk and def components to all her damage a set that buffs both halves equally will almost always be better than sets like Husk or Nighttime which either give ATK or DEF + GEO
Def is a higher Portion of her damage, so def sands will be preferred
DEF/GEO/CRIT
Weapons
Harbinger Good :OK:
Spindle seems Worse than Harbinger bc of her hit intervals not being convenient for the weapon (if both turrets hit within 1.5s, only one hit gets buffed)
when no gorou, husk better
sorry
-jstern25