Starting at floor 601 and rushing is the fastest way to cap your Resistance Power (RP).
"Haste/Increased Priority" skills are essential to counter high-AGI enemies in higher floors. 3. Key Superbosses and Encounters Labyrinth of Chaos/Tips - Monster Girl Quest - Miraheze Labyrinth of Chaos
A more difficult version unlocked by reaching Floor 600 in the regular Labyrinth, featuring superbosses every 5 floors. 2. Strategies and Tips Starting at floor 601 and rushing is the
Complete the main story and access the bookcase in Hades. Labyrinth of Chaos
Focus on 3-4 Damage Dealers and fill the rest with support to keep team HP/MP stable.