Hello Rovers! Welcome to Lootbar's Mortefi Build Guide for Wuthering Waves. This Resonator guide provides an overview of Mortefi, covering his gameplay mechanics and off-field playstyle, recommended skills to prioritize, the best weapons, optimal Echo sets, suggested main stats and sub-stats, and the best team compositions to maximize his effectiveness as a sub-DPS and Heavy Attack DMG Buffer.
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Mortefi Resonator Overview
| Resonator Information |
 | Rarity | 4★ |
| Element | Fusion |
| Weapon Type | Pistol |
| Team Role | Sub DPS and Support |
Mortefi Gameplay and Playstyle
Mortefi is a 4★ Fusion Sub-DPS and Pistols user who specializes in coordinated attacks and Heavy Attack amplification. His kit centers on generating Coordinated Attacks through his Resonance Liberation, allowing him to deal consistent Fusion damage while remaining off the field. Mortefi briefly rotates in to use his Resonance Skill and Resonance Liberation, then swaps out to trigger his Outro Skill, which grants a powerful Heavy Attack DMG Buff to the next character. With low field-time requirements and strong synergy with Heavy Attack resonators, he functions primarily as a subDPS, fitting best into teams that revolve around charged or Heavy Attack-focused tams.
Mortefi Skill Priority
| Skill | Priority | Reason |
| Resonance Liberation | ★★★★★ (Top) | - Mortefi’s core ability and main source of off-field damage. Enables coordinated attacks that trigger consistently while he is off the field, making it his most impactful upgrade.
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| Forte Circuit | ★★★★★ (Top) | - Directly enhances the damage and effectiveness of his coordinated attacks. Higher levels significantly improve his sustained off-field DPS.
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| Resonance Skill | ★★★ (High) | - A key setup skill that helps generate Energy and supports his rotation before activating Liberation. Important, but secondary to Liberation and Forte.
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| Basic Attack | ★ (Low) | - Rarely used in actual rotations since Mortefi spends minimal time on-field. Provides little value compared to his core skills.
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| Intro Skill | ★ (Low) | - This skill deals scarce damage, making investment unnecessary.
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Mortefi Best Weapons
Mortefi focuses on providing consistent off-field Fusion damage and enabling Heavy Attack resonators through his Outro Skill. To maximize his value as a sub-DPS enabler, you’ll want weapons that improve Energy Regen to maintain high Resonance Liberation uptime, increase ATK or CRIT stats to strengthen his coordinated attacks. Below are some recommended weapons that synergize well with Mortefi’s off-field, damage-amplifying playstyle.
| Best in Slot |
| Best Weapon | 
Static Mist (5★) | - Base ATK: 587
- Bonus Stat: 24.3% Crit Rate
- Weapon Effect (R1): Increases Energy Regen by 12.8%. Incoming Resonator's ATK is increased by 10% for 14s, stackable for up to 1 times after the wielder casts Outro Skill.
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| 5 Star Alternative |
| 1st | 
The Last Dance (5★) | - Base ATK:500
- Bonus Stat: 72% Crit DMG
- Weapon Effect (R1): Increases ATK by 12%. Every time Intro Skill or Resonance Liberation is cast, Resonance Skill DMG Bonus increases by 48% for 5s.
|
| 4 Star Alternatives |
| 1st | 
Relativistic Jet (4★) | - Base ATK: 462
- Bonus Stat: 18.2% ATK
- Weapon Effect (R5): Casting the Resonance Skill grants 10 Resonance Energy and increases ATK by 20, lasting for 16s.
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| 2nd | 
Cadenza (4★) | - Base ATK: 337
- Bonus Stat: 51.8% Energy Regen
- Weapon Effect (R5): When Resonance Skill is released, restores Concerto Energy by 16. This effect can be triggered 1 time every 20s.
|
| 3rd | 
Undying Flame (4★) | - Base ATK: 412
- Bonus Stat: 30.3% ATK
- Weapon Effect (R5): When Intro Skill is released, increases Resonance Skill DMG Bonus by 40 for 15s.
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| 4th | 
Novaburst (4★) | - Base ATK: 412
- Bonus Stat: 30.3% ATK
- Weapon Effect (R5): When the Resonator dashes or dodges, increases ATK by 8, stacking up to 3 time(s). This effect lasts for 8s.
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| 5th | 
Thunderbolt (4★) | - Base ATK: 387
- Bonus Stat: 36.4% ATK
- Weapon Effect (R5): When hitting a target with Basic Attacks or Heavy Attacks, increases Resonance Skill DMG Bonus by 23. Stacking up to 3 times.
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Mortefi Best Echo Sets
Mortefi works equally well with Moonlit Clouds and Empyrean Anthem as a sub-DPS enabler. Moonlit Clouds provides Energy Regen and an ATK buff to the incoming Resonator, while Empyrean Anthem boosts Coordinated Attack damage and grants a short ATK buff to the active character. Molten Rift is used for a damage-focused build, increasing Mortefi’s personal Fusion damage.
1. Moonlit Clouds Sub-DPS Echo Set (SubDPS Set Option 1)
| Echo Set | 43311 |
| Echo Set Effects |
Moonlit Clouds | - 2-Pc: Energy Regen +10%.
- 5-Pc: After using Outro Skill, increases the ATK of the next Resonator by 22.5% for 15s.
|
| Main Echo |
Impermanence Heron | - Transform into Impermanence Heron to fly up and smack down, dealing 310.56% Havoc DMG. Long press to stay as Impermanence Heron and continuously spit flames, each attack dealing 55.73% Havoc DMG.
Once the initial attack lands on any enemy, the current character regains 10 Resonance Energy. If the current character uses their Outro Skill within the next 15s, the next character’s damage dealt will be boosted by 12% for 15s. - CD: 20s
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Alternative: Bell-Borne Geochelone | - Activate the protection of Bell-Borne Geochelone. Deal Glacio DMG based on 132.24% of the current character's DEF to nearby enemies, and obtain a Bell-Borne Shield that lasts for 15s
The Bell-Borne Shield provides 50.00% DMG Reduction and 10.00% DMG Boost for the current team members, and disappears after the current character is hit for 3 times. - CD: 20s
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2. Empyrean Anthem Sub-DPS Echo Set (SubDPS Set Option 2)
| Echo Set | 43311 |
| Echo Set Effects |
Empyrean Anthem | - 2-Pc: Energy Regen +10%.
- 5-Pc: Increase the Resonator's Coordinated Attack DMG by 80%. Upon a critical hit of Coordinated Attack, increase the active Resonator's ATK by 20% for 4s.
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| Main Echo |
Hecate | - Transform into Impermanence Heron to fly up and smack down, dealing 310.56% Havoc DMG. Long press to stay as Impermanence Heron and continuously spit flames, each attack dealing 55.73% Havoc DMG.
Once the initial attack lands on any enemy, the current character regains 10 Resonance Energy. If the current character uses their Outro Skill within the next 15s, the next character’s damage dealt will be boosted by 12% for 15s. - CD: 20s
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3. Molten Rift Sub-DPS Echo Set (Fusion DPS-Oriented Set)
| Echo Set | 43311 |
| Echo Set Effects |
Molten Rift | - 2-Pc: Fusion DMG +10%.
- 5-Pc: Fusion DMG +30% for 15s after releasing Resonance Skill.
|
| Main Echo |
Inferno Rider | - Transform into Inferno Rider to launch up to 3 consecutive slashes in a row, each slash dealing 242.40%, 282.80%, and 282.80% Fusion DMG, respectively. After the final hit, increase the current character’s Fusion DMG by 12.00% and Basic Attack DMG by 12.00% for 15s.
Long press: Transform into Inferno Rider and enter the Riding Mode. When exiting the Riding Mode, deal 282.80% Fusion DMG to enemies in front. - CD: 20s
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Nightmare: Inferno Rider | - Transform into Nightmare: Inferno Rider and jump to attack enemies in front, dealing 405.00% Fusion DMG.
The Resonator with this Echo equipped in their main slot gains 12.00% Fusion DMG Bonus and 12.00% Resonance Skill DMG Bonus.
Hold Echo Skill to transform into Nightmare: Inferno Rider and enter Riding Mode. When exiting Riding Mode, deal 283.50% Fusion DMG to enemies in front. - CD: 20s
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Mortefi Best Echo Stats
Here are the best Echo main stats and sub-stats for Mortefi.
Echo Main Stats
| Main Stats | Cost |
| Crit Rate or Crit Damage | 4 |
| Fusion DMG Bonus or Energy Regen | 3 |
| ATK% | 1 |
Echo Sub-Stats
| Substats | Priority |
| Crit DMG | ★★★★ (High) |
| Crit Rate | ★★★★ (High) |
| Energy Regen | ★★★ (Mid) |
| ATK% | ★★ (Low) |
Mortefi Best Team Comps
1. Augusta - Mortefi - Shorekeeper
| Characters |
Augusta |
Mortefi | 
Shorekeeper |
| Echo Sets |
 
Crown of Valor (3-Pc) Any Electro (2-Pc) | 
Moonlit Clouds (5-Pc) | 
Rejuvenating Glow (5-Pc) |
2. Jiyan - Mortefi - Shorekeeper
| Characters |
Jiyan |
Mortefi | 
Shorekeeper |
| Echo Sets |
Sierra Gale (5-Pc) | 
Moonlit Clouds (5-Pc) | 
Rejuvenating Glow (5-Pc) |
3. Galbrena - Mortefi - Shorekeeper
| Characters |
Galbrena |
Mortefi | 
Shorekeeper |
| Echo Sets |
 
Flamewing Shadow (3-Pc) Any Fusion (2-Pc) | 
Moonlit Clouds (5-Pc) | 
Rejuvenating Glow (5-Pc) |
4. Phoebe - Mortefi - Shorekeeper
| Characters |
Phoebe |
Mortefi | 
Shorekeeper |
| Echo Sets |
Eternal Radiance | 
Moonlit Clouds (5-Pc) | 
Rejuvenating Glow (5-Pc) |
5. Jinhsi - Mortefi - Verina
| Characters |
Jinhsi |
Mortefi | 
Verina |
| Echo Sets |
Eternal Radiance |
Empyrean Anthem (5-Pc) | 
Rejuvenating Glow (5-Pc) |
Mortefi Best Resonance Chains
| S1:Solitary Etude |
- Rating: ★★★ Good
- During Resonance Liberation Burning Rhapsody, Mortefi launches Coordinated Attacks when the on-field character performs their Resonance Skills, firing 2 Resonance Liberation's Marcato hits, dealing Fusion DMG.
- Adds extra damage to his Ultimate, but most of Mortefi’s best teammates do not rely heavily on Resonance Skills, limiting its overall impact.
|
| S2: Hypocritical Hymn |
- Rating: ★★★★★ Best
- After using the Echo Skill, Mortefi restores an additional 10 Resonance Energy. This can be triggered once every 20s.
- Improves energy consistency and works well with the Empyrean Anthem set, but is not essential if Energy Regen is already sufficient.
|
| S3: Flaming Recitativo |
- Rating - ★★★★ Good
- During Resonance Liberation , the of Resonance Liberation's is increased by .
- A strong damage upgrade that reduces reliance on CRIT DMG substats, though it still requires adequate CRIT Rate to be effective.
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| S4: Cathartic Waltz |
- Rating: ★★★★★ Best
- The duration of Resonance Liberation is extended by .
- His most impactful upgrade dramatically increases coordinated attack uptime and reduces downtime between Ultimate casts.
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| S5: Funerary Quartet |
- Rating: ★★★ Good
- When Resonance Skill Fury Fugue hits a target, 4 Resonance Liberation's Marcato hits will be fired, dealing Fusion Damage. DMG of Resonance Liberation's Marcato fired in this way is reduced by 50%.
- Provides extra hits but does not meaningfully improve Mortefi’s main role as a sub-DPS buffer, making it low priority.
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| S6: Apoplectic Instrumental |
- Rating: ★★★★★ Best
- When Resonance Liberation is cast, of all team members is increased by for .
- A strong buff that enhances Mortefi’s team utility, stacking on top of his existing buffs and coordinated damage.
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Get Mortefi by Topping Up on LootBar.gg!
Mortefi is a reliable choice for teams built around Heavy Attack resonators or compositions that benefit from coordinated attacks. He performs well even at low investment, but optimized Echo sets, Energy management, and clean rotations greatly enhance his overall impact. By following this Mortefi build guide, Rovers can optimize Mortefi's value. For Rovers planning to enhance their resonators, head straight to Lootbar.gg now for an affordable and secure Wuthering Waves Top-up.
