Fusion 
Pistols 
Concerto Efficiency Resonance Liberation Damage Coordinated Attack Heavy Attack DMG Amplification Build · 01
Ranked on calculated damage at equal investment. Everything below rank one is a real option, not a consolation.
Pistols 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.
Official Kuro recommendation and best-in-slot option.
Cadenza51.8% Energy Regen · 338 ATK · Ceaseless Aria Accessible 4-star option. 
Undying Flame30.4% ATK · 412 ATK · Loyalty Accessible 4-star option. 
Lux & Umbra48.6% Crit. DMG · 588 ATK · To Fire She Returns 
Phasic Homogenizer48.6% Crit. DMG · 588 ATK · Insight Bearer 
Skull Thrasher72.0% Crit. DMG · 500 ATK · Wakeful Loner Build · 02
One recommended setup this patch. Farm the listed main stats first, then refine the substats in order.
Recommended Full Set
Main stats by slot
Main echo
Second slot
Third slot
Fourth slotFifth slotSubstat priority
1Energy Regen2Crit. Rate
3Crit. DMG4ATK%
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.
Echo skill: 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.
Skill upgrade priority
FirstResonance Liberation 
SecondForte Circuit 
ThirdResonance Skill 
FourthBasic Attack 
FifthIntro Skill Build · 03
9 verified lineups. Other rotations stay off the page until they are checked against the current game.
Recommended lineup
SpectroSubstitutions
No verified replacement for this slot.
AeroSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.Recommended lineup
AeroSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.AeroAlso works
Alternative lineup
ElectroSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.SpectroAlso works
Use support outro windows before Augusta takes field time.
Alternative lineup
FusionSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.SpectroAlso works
Shorekeeper → Qiuyuan → Galbrena.
Alternative lineup
AeroSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.AeroAlso works
This is the best core, for jiyan and will be for a long core, could be named the only true aero mano core as well
Worth knowing: Mortefi → Shorekeeper → Jiyan; Shorekeeper's outro gives Jiyan +15% All DMG with CRIT buffs and dodge recovery. Only consider Ciaccona in the third slot with Jiyan on Windward Pilgrimage, Iuno in the team, and Ciaccona on her Signature Weapon.
Alternative lineup
HavocSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.SpectroAlso works
It is recommended to use Cantarella with Verina in this team, Shorekeeper takes extended field time that may result in cooldown issues.
Alternative lineup
SpectroSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.SpectroAlso works
Verina must be used with Brant and Changli in order to have Coordinated Attacks on the team. Generally difficult teams to pilot for casual players - not recommended unless you know what you're doing.
Alternative lineup
HavocSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.
GlacioAlso works
Start with Suisui to build her Forte and cast Resonance Liberation, switch to Chisa for a full Basic Attack string and Resonance Liberation, then enter on Yangyang: Xuanling via Intro and hold Heavy Attack until her Forte depletes.
Alternative lineup
FusionSubstitutions
No verified replacement for this slot.FusionSubstitutions
No verified replacement for this slot.SpectroAlso works
Use Iuno's repeated shields to build Jingran's Ghost Shroud, then use her Outro for 50% Heavy Attack DMG Amplification before Jingran takes the field. Shorekeeper supplies healing and Crit. buffs.
Detailed reference
Mortefi uses his dual pistols and flames to perform up to 4 consecutive shots, dealing Fusion DMG.
Mortefi enters the aiming state for a more powerful shot.
The aimed shot fired after charging finishes deals Fusion DMG.
Mortefi consumes STA to perform consecutive shots at the target in mid-air, dealing Fusion DMG.
Use Basic Attack after a successful Dodge to attack the target, dealing Fusion DMG.
Launch a flashing lightning of flames forward, dealing Fusion DMG.
When Mortefi's Annoyance reaches 100, his Resonance Skill is replaced with Fury Fugue.
When casting Fury Fugue, Mortefi consumes all Annoyance to unleash high-speed flame lightning, dealing Fusion DMG, considered as Resonance Skill DMG.
Mortefi can hold up to 100 Annoyance and can restore Annoyance in the following ways:
Deal Fusion DMG, and apply Burning Rhapsody to all characters on the team.
When the active character's Basic Attack hits the target, Mortefi launches a Coordinated Attack, firing 1 Marcato.
When the active character's Heavy Attack hits the target, Mortefi launches a Coordinated Attack, firing 2 Marcato.
Mortefi can launch one Coordinated Attack every 0.35s.
Deals Fusion DMG.
Attack the target, dealing Fusion DMG.
After casting Resonance Skill Passionate Variation, the damage of Resonance Skill Fury Fugue is increased by 25% for 8s.
During Resonance Liberation Burning Rhapsody, each hit of Resonance Liberation Marcato will increase the DMG of the next Resonance Liberation Marcato by 1.5%, which can be triggered once every 0.35s, stacking up to 50 times.
The effect will be reset after Resonance Liberation Burning Rhapsody ends.
The incoming Resonator gains 38% Heavy Attack DMG Amplification for 14s or until they are switched out.
When the target's Off-Tune Level is full, the Resonator may cast Tune Break on the target.
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.
After using the Echo Skill, Mortefi restores an additional 10 Resonance Energy. This can be triggered once every 20 second.
During Resonance Liberation Burning Rhapsody, the Crit. DMG of Resonance Liberation's Marcato is increased by 30%.
The duration of Resonance Liberation Burning Rhapsody is extended by 7s.
When Resonance Skill Passionate Variation or Resonance Skill Fury Fugue hits a target, Coordinated Attacks will be triggered to fire 4 Resonance Liberation's Marcato hit(s), dealing Fusion Damage. DMG of Resonance Liberation's Marcato fired in this way is reduced by 50%.
When Resonance Liberation Violent Finale is cast, ATK of all team members is increased by 20% for 20s.
Kit text from the official Wuthering Waves guide by Kuro Games.
Mortefi is a Fusion element resonator in Wuthering Waves.
Mortefi uses a Pistols in Wuthering Waves.
Mortefi is a 4-star resonator in Wuthering Waves.
Mortefi serves as: Concerto Efficiency, Resonance Liberation Damage, Coordinated Attack, Heavy Attack DMG Amplification.
Mortefi was released on 23 May 2024.