Hecate is an exceptional echo for Sub-DPS characters, particularly those who excel at coordinated attacks. As long as these attacks land critical hits, Hecate boosts the current resonator's ATK. Additionally, its echo effect summons blades that can deal damage even when the character is not on the field.

The Nightmare Inferno Rider is a formidable attacker that shines when summoned in battle. Upon activation, its skill increases ATK for 15 seconds, allowing for devastating damage output. With the ability to deal up to 270% damage, this echo is a valuable asset. Furthermore, it can be used to traverse the overworld quickly, making it a versatile choice.

The Nightmare Crownless is a powerful echo that deals a substantial 270% damage every time it is summoned. One of its key features is the ability to charge its skill up to three times, enabling the echo skill to be used multiple times. This flexibility makes it a highly desirable echo for certain characters.

The Nightmare Tempest Mephis is one of the top echoes for Electro DPS characters. To maximize its potential, it's essential to determine whether your resonator scales off Resonance Skill or Resonance Liberation. If it's the former, Tempest Mephis is the ideal choice. Moreover, it has access to Empyrean Anthem sonata effects, making it suitable for coordinated attack Sub-DPS characters.

The Nightmare Thundering Mephis is another exceptional echo for Electro DPS characters. Similar to Tempest Mephis, its effectiveness depends on whether your resonator scales off Resonance Skill or Resonance Liberation. If it's the latter, Thundering Mephis is the better option, offering unparalleled damage output.

The Nightmare Mourning Aix is the premier main echo option for DPS characters that deal Spectro Frazzle damage. Although its usage is limited due to the scarcity of Spectro Frazzle characters, it remains the top choice for those who can utilize it. Characters like Rover and Phoebe can greatly benefit from this echo, making it a valuable asset in specific team compositions.

The Nightmare Impermanence Heron is an echo that primarily focuses on supporting Sub-DPS characters in Havoc teams. While it may lack flexibility, its skill deals an impressive 300%+ total Havoc damage. However, its normal variants might be more useful in non-Havoc team situations, offering an alternative for players who need more versatility.

The Impermanence Heron is an echo that increases the Resonance Energy of the equipping character and boosts the ATK of the next character to take the field. Its skill is capable of dealing 300%+ total Havoc damage, making it an excellent choice for Sub-DPS characters running Moonlit Clouds. Although the nightmare version of this echo has a more limited Midnight Veil sonata effect, it remains a top choice for Havoc Sub-DPS characters.

The Fallacy of No Return is the best Rejuvenating Glow echo for the game's top HP-scaling supports. It works seamlessly with Shorekeeper, the current best healer in the game. One of its notable features is the ability to charge Concerto Energy rapidly by holding the echo button, allowing resonators to act while the echo is delivering a flurry of punches.

The Sentry Construct is the ideal echo for those utilizing the Frosty Resolve sonata effect. It deals significant damage as an echo and provides bonuses without needing to be summoned. This echo is perfect for players who want to maximize their damage output while minimizing the need for manual summoning.