Lynette serves as a Burst-oriented Anemo unit, that unlike other Anemo units does not excel in any one category such as personal damage, crowd control and buffs. Her potential for crowd control is partially dependent on unlocking her [C1] and [C4], and neither her ATK buff nor her personal damage reach notably high levels. What truly distinguishes her among Anemo characters is her unique capability to utilize Ousia-aligned attacks as a Fontaine character. This distinct trait enables her to neutralize specific enemy mechanics by triggering annihilation reactions, as part of the overall Arkhe mechanic.
Regarding Weapon Choices:
Sacrificial Sword: Ideally you would want higher refinement levels as in [R3]+ so its cooldown aligns better with your rotation.
Freedom-Sworn: While this is her best buffing weapon it would be extremely difficult to meet her Energy Recharge requirements without an Energy Recharge weapon especially while primarily using her as an off-field unit.
Regarding Artifact Choices:
Sets
Emblem of Severed Fate (4): This set will give Lynette her best personal damage output, assuming the team is already running (4).
Noblesse Oblige (4): This is a good option for her in teams that either won't benefit significantly from (4) shred, or where putting it on her is the lowest total team damage loss.
Substats
Energy Recharge: Prioritize until requirements are met.
CRIT Rate: Only assumes higher priority than CRIT DMG when using .