PrivatyHas Favorite Item

Privaty with her Favorite Item is a Water damage-type Nikke at Burst 3 who raises team ATK and Reload Speed and boosts single-target damage through her last-bullet chain.
She can be run either as a totem or as a main DPS, so her investment stages are clear-cut.

Skill 2 EX Magazine raises all allies' ATK and Reload Speed at the start of Full Burst Time, and reduces Max Ammo to reach the last-bullet condition faster. With her Favorite Item effect, increased attack damage is added as well.

Skill 1 LD Assault deals additional damage when her last bullet hits, and if the target meets the target lock or stun condition, an extra hit lands on the same enemy. Her Burst AK Missile deals damage to all enemies and applies a stun and a target lock debuff together, opening up the Skill 1 chain.

Auto is enough by default. However, timing her Burst manually to focus the last bullet on windows when stun and target lock are applied reduces damage variance.

Prioritize Harmony Cubes that steadily support reloading and ammo management. If you have a higher-level cube, you can use it before the theoretical #1 pick.

Set Elemental Advantage damage and ATK first, and fill the remaining lines with crit stats to boost single-target damage. To stabilize her last-bullet chain, mixing in some Hit Rate options is fine.

The skill levels above are the end-game targets when using her as a totem. As a DPS, 10/10/10 is the end-game target.

Run her in the Burst 3 damage and buff slot in Story, bosses, and Tower. In Arena, whether she's used depends on the meta and the opponent's lineup.

At Burst 3 she can provide both team buffs and single-target damage.

Missing her last-bullet chain lowers her expected damage, and if the conditional target is off, her bonus hit efficiency drops.