Kuki Shinobu build recommendations
This is a dendro team that requires a reliable electro trigger unit to work, for which Kuki is one of the best electro units to perform this role.
Regarding Weapon Choices
This becomes a better choice than Iron Sting at [C4] when you can gain the 3rd passive stack without extending your rotation time or taking extra field time. It can also net more Elemental Mastery than Freedom-Sworn at 3 stacks, assuming you have actually built some HP% Substats on your Sands/Goblet/Circlet, but this is usually not enough to out-perform the overall gains from Xiphos' Moonlight/Freedom-sworn's respective passives.
This weapon performs very similarly in a hyperbloom focused build to Iron sting since its passive does not effect Hyperbloom damage.
Artifact stats priority
em hp% hp er