What artifact sets for this team? ( Current sets in description )

Chevreuse C6 - 4pc Tenacity of the Melith

Raiden C2 - 4pc Emblem of Severed Fate ( current main dps but wants to make her Arle support )

Kujou Sara C6 - 4pc Embed of Severed Fate ( thinking about using Noblesse Oblige? )

Would also like if someone could recommend what stats to go for