In Chaos Shadows, you can use a hero for only one challenge per day.
This guide uses 15 top-notch team lineups using accessible Epic and Rare heroes, designed to deal over 22 million DMG per round even with auto-battle. These lineups will help you rack up more rewards during your Otherworld Exploration.
The first part of this guide includes 7 team lineups for tackling the bosses Fathomdown, Yfeir and Quaesitia. Strategies for the other three bosses are covered in the second part.

Ⅰ. Battle Preparation

[Recommended Level and Equipment]

●Recommended Level
In Chaos Shadows, you'll need to build multiple lineups. You can start by leveling up your DPS heroes, as they’re the priority. Regular DEF and support heroes should reach level 90.
For support heroes like Zhar'loth with DMG potential, it’s also a good idea to boost their levels.
●Equipment Requirements
The whole team is recommended to have fully refined (+20), Legendary quality equipment. If you have Mythic Equipment like Energy Harvester, Precise Carnage Gauntlets and Moonlight Mantle with suitable attributes, you can use them in Chaos Shadows.
You can use easily accessible Legendary Artifacts. This guide only uses the common Mythic Artifacts like Solar King’s Horn and Witch’s Remains. If you have more Mythic Artifacts, you can further reduce the attribute requirements for your heroes.

[Key Attribute Recommendations]

1. Ideally, the HP of each of your heroes should be over 40,000.
2. It is recommended that your main tank hero have HP > 65,000 and DEF > 2,500;
3. Heroes who handle debuffs or control effects should have more than 320 Accuracy.

Ⅱ. Recommended Lineups

Fathomdown

Lineup 1

Lineup: Eurion + Pargu + Estella + Bleddyn + Nadja
Captain Aura: Nadja - Crit Damage Aura
Positioning Example:

Equipment Example:

Lineup 2

Lineup: Vinyara + Meggan + Shinnah + Seidic + Gerthin
Captain Aura: Vinyara - Accuracy Aura
Positioning Example:

Equipment Example:

Lineup 3

Lineup: Aladiah + Feenja + Rava + Rowena + Auster
Captain Aura: Rava - Crit Damage Aura
Positioning Example:

Equipment Example:

Yfeir

Lineup 1

Lineup: Ripekas + Deverick + Thia + Zhar'loth + Zadok
Captain Aura: Zhar'loth - ATK Aura
Positioning Example:

Equipment Example:

Lineup 2

Lineup: Astaion + Torrin + Kyrza + Perseus + Mera
Captain Aura: Mera - ATK Aura
Positioning Example:

Equipment Example:

Lineup3

Lineup: Theodemer + Feenja + Baelvernal + Tatoth + Taldie
(If you have Legendary heroes Elecebre, Ghul'ende, or Felosia, you can replace Theodemer, Feenja and Baelvernal for a safer output environment)
Captain Aura: Feenja - Enlightenment Aura
Positioning Example:

Equipment Example:

Quaesitia

Lineup 1

Lineup: Frurbath + Oggok + Rasran + Gragrir + Dargo
Captain Aura: Rasran - Crit Damage Aura
Positioning Example:

Equipment Example: