Highlighted weapons are free options.
Prune is a support that relies on triggering the Swirl reaction to buff characters. Triggering Swirl will convert her Banehunter Oathhammer (Skill) into the element she Swirls, and as long as her A4 talent is unlocked, hitting opponents with a converted Banehunter Oathhammer or her Burst will activate the Tolling Rally effect, which will provide DMG buffs to the team based on Prune's ATK. In addition, when a Hexerei character under Tolling Rally triggers a reaction, Prune gains an ATK% boost, and if that reaction was Swirl, the triggering character also gains an ATK% boost.
Prune's [C1] let's her restore 2 Energy every 1.8 seconds whenever a converted Banehunter Oathhammer hits opponents. How much total energy she can restore depends how often Prune is able to trigger Swirl during the duration of her Burst. Prune's [C6] increases her Burst duration by 4 seconds.
Tolling Rally does not apply to Prune herself.
Tolling Rally caps out at 4,000 ATK, usually not feasible to get unless Prune is in a Hexerei team.
Talent levels are not a necessity as they do not increase Prune's buffing capabilities.