Best IVs for Caeda?

Honestly, I was asking myself the same question.

If you run life and death for her a slot, an attack boon lets her sit at 51/42 before any other skills are considered. A speed buff takes her to 47/45. With flashing blade in her weapon, that makes her into a Mia on wings on steroids. I’d say attack with life and death because she can hit hard and fast, killing most opponents very quickly and doubling anything with less than 38 speed, and losing that amount of attack in a tier between meh and powerful is a game changer, because 8 less effective damage on a double could spell doom for her.

Edit: I know that her flashing blade is vital, but she would have no business taking on super fast units like Ayra or Mia to begin with. Leave those to Cordelia, who can Firesweep/Brave them to death in one initiation.

Caeda's ATK is pitifully low and needs it to deal damage against armored foes. Her base speed is pretty high at 37 (which is only topped by a handful of units like Ayra and Mia) and comes with Darting Blow naturally. Plus, you can put the Phantom Speed SS on her if Darting Blow isn't enough to trigger the Flashing Blade effect of her refine. I got a +ATK, -HP Caeda and I feel that's the optimal spread for Wing Sword builds so she can deal consistent special damage with skills like Iceberg or Glacies.

I'd say +Atk/-HP is her best IV.

Atk is her superboon too. She can quite easily reach 50/45 Atk/Spd with simply Spd+3 seal, Fury and her new weapon's unique effect. I'd avoid LnD as she wants to preserve her Res for Glacies procs. HP is the obvious dump stat as it's easily made up for with weapon refines and/or summoner support. This is before merges and emblem buffs.