Navia is a DPS that doesn't demand much field time. While most of her DPS is frontloaded into her Skill, she should stay on-field to take advantage of her 4s Geo conversion window. Her Burst lets her generate Crystal Shrapnel stacks and is important to use every rotation.
Full Combo:
The final is omitted if units like Fischl or Xiangling are used during Bennett's Burst before Navia.
Regarding Weapon Choices:
Rankings assume Navia is used with Bennett, 125% Energy Recharge Requirement.
Serpent Spine: One of her best performing 4-star options, at [R5] max stacks it will perform as well as
Fang of the Mountain King: Assumed averaged 0.5 stack of Burst%, and 1 stack of Skill% for Navia's second Skill
Wolf's Gravestone: Assumed passive is not active
The Unforged: Assumed shielded, dynamically stacked
Tidal Shadow: Assumes Navia is able to be healed. Otherwise, it is not recommended to use this weapon.
Earth Shaker: Assumes there is a Pyro-related reaction before her field time, this is achievable by using Bennett's Skill before swapping to Navia, or using an off-field Pyro unit like Xiangling or Mavuika
Regarding Artifact Choices:
Sets
Marechaussee Hunter (4): Furina teams only, performs as well or better than
Substats
Energy Recharge: Prioritize until requirements are met.