The Overseer (Canto X, Route B)

Before the B3F battle

Prepare Customer Lv. 65 and flexible actions for the rules

• Shop toward Customer Lv. 65 and Diamond rank. Both are reachable before B3F, so check unpurchased shops. Check Customer Rank separately from Identity levels outside the dungeon.
• Yi Sang, Meursault, and Ishmael are required. Bring Identities with usable defense for turns when attacks are prohibited. Save E.G.O resources, SP, and HP recovery for Unbreakable area damage.
• Blunt 1.5, Envy 1.25, and Sloth 1.2 are favorable. Use Pwie's Bleed application to maintain damage on the body while eliminating Prisoners promptly.

Turn 2 onward, before skill selection

Assign actions according to the four prohibitions

• First identify the three Sinners with rules. Raw Hide Damage Prohibited means no attacks targeting Prisoners: attack the body or defend. Tanning Rush Prohibited means no attacks on the body: attack Prisoners or defend.
• With Offensive Behavior Prohibited, do not equip a normal attack; defend instead. E.G.O is exempt from this rule, so it can be used to clash if resources and SP allow.
• With Defensive Behavior Prohibited, do not equip defense. Pick a legal attack target and clash. E.G.O is exempt from Offensive Behavior Prohibited, not automatically from targeting restrictions.
• Checks occur at Combat Start based on assigned targets and equipped skills. Do not confuse an automatic follow-up or defensive assist activating with manually equipping that skill. Rules are reapplied each turn; do not blindly repeat the previous turn's actions.

First half: summoning and consuming allies

Finish Prisoners and stop the summons you can

• Prisoners have 74 HP, but Uncreased Hide gives them 20 Shield and 2 Protection after summoning. Focus attacks from Sinners who can obey their rules, using Blunt or favorable sin affinities to finish them.
• Each surviving Prisoner increases “Fleshing” and Tumbling damage by 10%. Their Turn End survivor count also grants DMG Up next turn. Each death lowers the body's Defense Level by 1 for the battle, giving another reason to kill them.
• When normal “Splitting” appears, assign at least two Attack Skills with that exact slot as their main target to stop its Turn End summoning effect. Use Sinners who will not violate rules, and ensure both attacks target the same slot.
• “Massive Splitting” summons up to four and has no equivalent two-attack cancellation condition. Prisoners cannot exceed six alive. If the consumption skill appears, kill its low-HP Prisoner target first to prevent the Overseer's healing and buffs.

The body's Unbreakable attacks

Reduce Prisoner numbers, then win strong clashes for mitigation

• “Fleshing” has three Unbreakable Coins; Tumbling has three Unbreakable Coins and 7 Atk Weight. Winning either gives 80% damage reduction and prevents Stagger from that skill's damage.
• Damage drops if fast Sinners kill Prisoners before the body clashes. Do not violate a rule to force that order; prioritize legal actions and winnable clashes.
• Tumbling grants 2 Attack Power Up to the enemy side at Combat Start. A clash win does not prevent this buff; check the other enemies' skills too.
• Bleed, Rupture, and Unbreakable damage remain after a clash win. Clash with Prisoners you cannot kill to prevent next-turn Power Down, Defense Level loss, and Paralyze.

Body around 2,500 HP

Prepare for a forced turn end and Prisoner replenishment

• Around half max HP, the turn forcibly ends and the second half begins. Do not assume queued healing or Prisoner cleanup will still resolve; heal early. The exact boundary check remains unconfirmed, so expect the transition around 2,500 HP.
• At transition, Prisoners are replenished to six and the enemy side gains Rule Collapse. Attack Level +3 and Defense Level −3 make them easier to damage but strengthen incoming attacks.
• In the second half, “Leather Tumbling in Brain Fat: Original Sin Style” gains +1 Final Power per Prisoner On Use while the body's HP is below 50%. Do not judge the clash by its base maximum of 18 with many Prisoners alive.
• First-half passives stop generating extra slots in the second half, but skill-based summons and prohibitions continue. Keep stopping “Splitting” and eliminating Prisoners while finishing the body with Blunt or Bleed.

What to prepare first

• Finish shopping toward Customer Lv. 65 and Diamond rank. Check usable defense on the required Yi Sang, Meursault, and Ishmael too.
• Prepare Blunt, Envy, and Sloth damage and enough Speed to kill Prisoners first. You can also exploit Pwie's Bleed application, maintaining Bleed Potency and Count to damage the body.
• All of the body's attacks are Blunt. Bring Blunt resistance, HP healing, and high-Power skills for major clashes. Check SP and resources when using E.G.O under Offensive Behavior Prohibited.

Clash roles that adapt to the rules

Available Sinners change each turn. Avoid relying on only one major-clash specialist; use defense and E.G.O to avoid violations.

Fast Prisoner cleanup and body damage

Kill adds to reduce area damage and healing, then exploit the body's lowered defense.

HP recovery and Blunt resistance

Heal Unbreakable damage remaining after clash wins and prepare for second-half buffs.

One ally can fill several roles. First choose a main fighter who can win Clashes, then assign responsibilities for dangerous attacks and special mechanics.