Jean's Skill can be used to fling smaller mobs into the air to deal fall damage, and to stagger bigger ones. Her healing scales with ATK.
Regarding Weapon Choices:
Amenoma Kageuchi: This weapon can lower your Energy Recharge requirements, depending on the number of stacks on the passive and the refinement of this weapon. As such, at higher refines / more stacks on the passive, this weapon can perform better than , while at lower refines / less stacks, it can perform worse.
Lion's Roar: Depending on passive uptime, it can be ranked much higher in terms of Jean's personal damage.
Regarding Artifact Choices:
While typically Jean will heal enough that you do not need to try and build for as much healing as possible, when paired with Furina it can be beneficial swapping to an ATK% goblet and Healing Bonus circlet. This is to aid in building Fanfare points faster, and Jean's personal damage is not particularly significant to begin with. When building Jean in such a way, prioritize weapons which provide ATK% or Energy Recharge. If using , a CRIT Rate circlet can be taken to ensure more consistent procs.
For Support Jean, you can either go for more ATK for stronger heals, but relatively lower Burst uptime, or more Energy Recharge for lower heals, but higher Burst uptime. Choosing between these two is up to personal preference, although if another Anemo character is on the team, Jean has very few energy problems and can potentially go for a full Sub DPS build.
Sets
Viridescent Venerer (4): The bread and butter for Anemo characters in general, as it is commonly used for the 40% elemental resistance shred.
Noblesse Oblige (4): Another option for providing utilities to the team. This set gives a 20% partywide ATK boost after Jean casts her Burst.
Ocean-Hued Clam (4): The best set for Jean's personal damage, as the damage it deals scales with Jean's Burst healing. However, because Jean's total damage output is on the low end, it is generally recommended to prioritize utility options such as (4) or (4) over this set.
Substats
Energy Recharge: Prioritize until requirements are met.
Regarding Talent Choices:
If you prefer more damage than healing, prioritize Skill over Burst since it scales better.
ⓘ
Indicates important notes at the bottom of the page.
Reaction DPS Jean relies on her unique interaction regarding her Burst. If the active character if afflicted by Hydro / Pyro / Electro / Cryo, Jean's Burst will infuse them with Anemo and create a Swirl trigger around the character. This interaction can be abused by using Bennett to consistently infuse the active character with Pyro. This allows for an extremely high amount of Pyro Swirl triggers. These Swirl's damage scales off of Jean's Elemental Mastery.
Regarding Artifact Choices:
Substats
Energy Recharge: Prioritize until requirements are met.
Regarding Talent Choices:
Talents are not large upgrades for Reaction DPS Jean