Increases Resonance Energy of the equipping character and the ATK of the next character taking the field. The skill itself deals 300%+ total Havoc DMG. Still the best in slot for any Sub-DPS running Moonlit Clouds. The nightmare version of this echo only has the Midnight Veil sonata effect which is a bit more inclined for Havoc Sub-DPS's.

The best Rejuvenating Glow echo for the best HP-scaling supports in the game. Works with Shorekeeper, the best healer in the game right now. Can charge Concerto Energy extremely fast by holding the echo button. Resonators can still act while Fallacy is delivering a flurry of punches.

The best echo for Sub-DPS that does coordinated attack. ATK increase for the current resonator as long as the coordinated attacks deal critical hits. Echo effect summons blades that also works off-field.

Extremely effective attacker when summoned in battle. ATK is increased for 15s after skill activation. The skill deals up to 270% damage. Can be used in the overworld to traverse quickly.

Deals a total of 270% damage everytime it is summoned. Skill can be charged up to three times, so you can use the echo skill multiple times.

One of the two best echo for Electro DPS. See if your Resonator scales off Resonance Skill or Resonance Liberation. If Resonance Skill, use Tempest Mephis. Also has access to Empyrean Anthem sonata effects, so this echo could also work with coordinated attack Sub-DPS characters.

One of the two best echo for Electro DPS. See if your Resonator scales off Resonance Skill or Resonance Liberation. If Resonance Liberation, use Thundering Mephis.

Primary Gusts of Welkin and Windward Pilgrimage 4-cost echo. Grants Aero DMG Bonus to the wearer with bonus 10% if worn by Aero Rover. Can also be used by Ciaccona as the definitive Aero Erosion enabler. Definitive echo set for the Erosion DPS, Cartethyia. Seems to provide a small window of time-slowing effect when used, enabling you to deal damage freely.

Primary Aero Crown of Valor 4-cost echo. Can group enemies with its echo skill, great for mobs of enemies. Echo Skill is summon-type, so it will not interrupt any combo.

Deals decent Spectro DMG to enemies. Part of both Rite of Gilded Revelation and Pact of Neonlight Leap, which are good for Spectro Resonators, both DPS and Sub-DPS, respectively. Gives 10% All-Attribute DMG Bonus to Intro Skill of the next Resonator.

Great for providing passive Glacio DMG Bonus and Coordinated Attack DMG buffs. The skill itself deals 270%+ Glacio DMG. Less useful than Hecate in most situations as not all resonators that deal Coordinated Attacks scale off Glacio DMG Bonus.

The main echo for the two characters that uses Spectro Frazzle: Zani and Phoebe. The better option over Nightmare: Mourning Aix because it can also provide Heavy Attack DMG unconditionally. Pretty hard to farm because it's a 3-cost echo.

Has a great passive for Aero units that scale off Echo Skill DMG. Summon-type Echo, so it's easily weaved into combos. Deals quick and decent Aero DMG upon casting.

Deals Spectro DMG to enemies. Provides Spectro DMG and Basic Attack DMG just by equipping it as the main Echo. Has a unique interaction by having both Twin Nova Echoes.

Focuses mainly on Sub-DPS in Havoc teams, so it is a bit inflexible. The normal variants may be a bit more useful in non-Havoc team situations. The skill itself deals 300%+ total Havoc DMG.

The best echo for those running the new Frosty Resolve sonata effect. Deals a lot of damage as an echo. Does not need to be summoned to provide echo bonuses.

Deals decent Glacio DMG to enemies. A bit niche with the sets the Echo is available in, but is otherwise versatile on its own. Provides a good Glacio DMG buff to the next Resonator, boosting the user's sub-DPS potential.

Slightly tailor-fitted to Augusta, since it gives both Electro DMG and Heavy Attack DMG Bonus. The only 4-cost Echo in Crown of Valor, making it a high value option. This Echo is a transform-type Echo, so you will be using some time to deal damage with it. The stat bonus doesn't require Echo Skill activation, so you automatically get it once equipped.

A bit niche to use, since it can only be used by Lupa. Only 4-cost in Flaming Clawprint, so it is a bit valuable. Effect performs well with Lupa alone, but is a big waste on other units. Only farm if you are building Lupa!

So far only works as the second 4-cost for the 44111 echo configuration of Cartethyia. Buffs are a bit underwhelming, as it buffs both Glacio and Aero DMG Bonuses. No sonata effect that benefits Glacio characters despite buffing them.