Best emi artifacts
4-piece Unfinished Reverie
4-piece Deepwood Memories
4-piece Golden Troupe
The Unfinished Reverie set is the best Artifact set for Emilie’s build as it increases Attack by 18% and significantly increases damage dealt by the wearer when the Burning reaction is triggered nearby.
The Deepwood Memories is also a good alternative for Emilie, as it increases Dendro Damage and reduces Dendro resistance to enemies. Besides that, you can also use the Golden Troupe artifact set if you have good sub-stats on them.