Yumemizuki Mizuki is a driver that focuses on enhancing and triggering the Swirl reaction. Her only needed stats are Elemental Mastery, to strengthen her Swirl buff as well as Swirl damage, and Energy Recharge to be able to use her Burst every rotation for healing and more Swirls.
Regarding Weapon Choices:
Favonius Codex: A good choice in solo Anemo teams or teams with overall high Energy Recharge requirements.
Hakushin Ring: This weapon should only be used if there is an Electro DPS on the team.
Wandering Evenstar: This weapon is a great option if the team can use the attack buff. At higher refines, this weapon performs better than .
Regarding Artifact Choices:
Substats
CRIT Rate: Only recommended if using a Favonius weapon.