Guide
How the kit works
Bring Zani in with Immediate Execution when available. It deals Spectro DMG and gives her 12% Spectro DMG Bonus for 14 seconds through Quick Response. Use Routine Negotiation and Restless Watch to fill Redundant Energy. After Basic Attack Stage 3, time another Normal Attack to use the follow-up.
At 100 Redundant Energy outside Inferno Mode, hold the enhanced skill. Release it to attack, or block an incoming hit to counter. Either attack spends the gauge, enters Sunburst and applies Heliacal Ember on hit. Sunburst amplifies Zani's Spectro Frazzle DMG against the target by 20%.
Use Between Dawn and Dusk to enter Inferno Mode and gain 50 Blaze. There Will Be A Light unlocks Heavy Slashes when you have at least 30 Blaze. Press Normal Attack for the first slash, then press again to continue the chain. Holding the skill lets you block; a successful timed block leads into another slash.
The finishing Liberation becomes available below 30 Blaze or after 8 seconds in Inferno Mode. Cast it to deal Spectro DMG and leave the mode. When you switch out, Beacon For the Future consumes Heliacal Ember for damage and amplifies other Resonators' Spectro DMG against the marked target by 20% for 20 seconds.
Build and why
Use five pieces of Eternal Radiance. Its two-piece effect gives 10% Spectro DMG, and Heliacal Ember stacks count toward its Sonata Effect. The supplied set description does not specify the five-piece effect.
Blazing Justice is the first weapon choice. It gives 12% ATK, and casting Basic Attack activates 8% DEF ignore and 50% Spectro Frazzle DMG Amplification for 6 seconds. Its effect fits the damage type of Zani's Heavy Slashes.
Tragicomedy is next: Basic Attack or Intro Skill grants 48% Heavy Attack DMG Bonus for 3 seconds. Verity's Handle is another option, with 12% Attribute DMG Bonus and a Liberation damage bonus after casting Liberation. For stats, ATK, Crit. Rate and Spectro DMG Bonus are worth considering; Energy Regen can help with using Liberation.
Leveling priority
A suggested leveling order is There Will Be A Light, Between Dawn and Dusk, Restless Watch, Routine Negotiation, then Immediate Execution. The Forte comes first here because Heavy Slashes are a major part of Zani's damage. Liberation supports her Inferno Mode rotation, while the skill is used to build and spend Redundant Energy.
For maximum ascension, gather 170,000 Shell Credit, 4 LF Polygon Core, 12 MF Polygon Core, 12 HF Polygon Core, 4 FF Polygon Core, 46 Platinum Core and 60 Sword Acorus.
To raise all skills to maximum, gather 2,030,000 Shell Credit, 25 LF Polygon Core, 28 MF Polygon Core, 40 HF Polygon Core, 57 FF Polygon Core, 26 The Netherworld's Stare, 25 Cadence Seed, 28 Cadence Bud, 55 Cadence Leaf and 67 Cadence Blossom.
Resonance Chain nodes worth it
If you are considering deeper Resonance Chain upgrades, First Things First? Clock Out! (Sequence 6) is a strong option for the Heavy Slash rotation. It increases the slash multipliers and restores 70 Blaze once in Inferno Mode when Blaze falls below 70.
Stale Bread With Energy Drink (Sequence 2) is another useful stopping point: it gives 20% Crit. Rate and raises the multipliers of the two enhanced skill attacks by 80%. When the Alarm Clock Rings (Sequence 1) gives 50% Spectro DMG Bonus for 14 seconds after either enhanced attack and prevents Nightfall from being interrupted.
You can stop after the second node rather than pursue Each Day A New Commute (Sequence 3), which strengthens the final stage of the finishing Liberation, or Delivered In Full On Time (Sequence 5), which raises the opening Liberation's multiplier.
Teams
Look for a teammate who can inflict Spectro Frazzle. When a nearby Resonator applies it, Zani immediately triggers the damage of all Spectro Frazzle stacks and converts them into Heliacal Ember. Each converted stack gives her 5 Blaze. Phoebe is a teammate to consider; check your team's abilities when arranging the status application.
Rover: Spectro is another option to consider. A teammate dealing Spectro DMG can also make use of Zani's Outro amplification against the marked target. A sustain slot helps keep the team healthy while Zani spends time on field.
Common mistakes
Do not enter Inferno Mode expecting to build Redundant Energy there: Zani cannot gain it in that mode. Fill and spend the gauge beforehand when you can.
Do not switch away while holding a block stance, since the stance ends early. Watch Blaze during Inferno Mode as well. Below 30, the finishing Liberation becomes available, so use it instead of waiting for another Heavy Slash.
Do not assume the five-piece Eternal Radiance effect from its two-piece description. Also remember that Heliacal Ember lasts 6 seconds per stack, so leaving it too long can reduce the stacks available for your Outro.