Break Through the Demeter and Gaia SSSS Difficulty Dream Chronicle Dungeons!

It's the strategy guide you've all been waiting for, Chosen Ones! When challenging the Dream Chronicle's SSSS difficulty against a Demeter, Gaia, Cleopatra, Valkyrie, and Gawain lineup, the following strategy will help you claim victory with ease.
This strategy is suitable for players with a Magic Formation level of 400 or so and no limited-edition equipment.

[Heroes and Requirements]
Hades: Can resist Gawain's attacks.
Gaia (Max Stars): Aegis of Zeus + Vampire's Kiss (Vassago's Helmet is better). Try to increase STR as much as you can.
Morrigan: Try to stack as much INT as possible.
Lancelot: 200 or more P-EVA.
Artemis: Can resist Gawain's attacks.

Assist Heroes:
Sariel & Sera: Stealth (For Hades)
Freya: Cast Chains of Evil (on Artemis).

Alternative Assist Heroes:
Cleopatra, Gabriel, Mulan, Michael, Princess Longji, and Daphne. Select them according to the situation.
Supporters:
Valkyrie (to resist Cleopatra's AoE once).
Supporters:
Hestia (increases base stats).
Pandora (group buff).
Lilith (extra damage).

[Key Battle Considerations]
On the first turn, Artemis stuns Cleopatra, Lancelot taunts Valkyrie, Morrigan grants her Ultimate to Gaia, Gaia uses her Ultimate on Demeter, and Hades uses his Ultimate to trigger group stealth.

On the second turn, Artemis stuns Demeter, Lancelot taunts Valkyrie, Gaia uses her Ultimate to attack Demeter, and Hades defends. Requirements: Gaia must stay alive.

In the third round, due to the high damage of the enemy Gaia, your single-target physical counter shield will finish her off. Artemis stuns Cleopatra, Lancelot taunts Valkyrie, Morrigan can defend, and you can use your support skill to help Gaia get Demeter down to half HP and let Hades finish her off.

On the fourth turn, after killing Demeter, Divine Punishment will disappear and your attack power will be significantly boosted. After successfully reducing Cleopatra's bonus effect, you can finally kill her.