OUTERPLANE Chapter 4 Boss Guide: Clearing 4-8 to 4-10

To clear Stages 4-8 through 4-10 in OUTERPLANE, absorb the Daredevil Ghost's opening single-target burst in Stage 4-8, conserve combat resources across Stage 4-9, and shatter the Humanoid Guardian's defensive shield in Stage 4-10 before its charged Overdrive wipes your team.

Stage 4-8: Daredevil Ghost Strategy

The Daredevil Ghost is an agile assassin that targets squishy backline heroes with a high-damage opening burst. Allowing the boss to cycle turns freely risks early party casualties that fail three-star stage requirements.

Absorb or redirect the opening attack: Deploy a frontline defender with Taunt or damage-sharing mechanics to absorb the initial strike.
Debuff before the boss acts: If your defender lacks immediate control, tune your team's Speed so an offensive support hero acts first. Apply attack reduction or accuracy penalties to blunt the boss's burst damage.
Focus fire: Once the primary burst is absorbed, direct all single-target damage into the Daredevil Ghost to eliminate it before secondary wave adds can overwhelm your party.

Stage 4-9: Wave Management and Resource Preparation

Stage 4-9 serves as an endurance buffer between two difficult encounters. Enemies deal steady attrition damage intended to exhaust your healer’s cooldowns and force you into burning Burst resources prematurely.

Save high-cost abilities: Do not trigger high-tier Burst skills or Chain Skills to finish the final wave in this stage.
Recover with basic skills: Let your sustain units heal the party with standard abilities and passive triggers while damage dealers clean up remaining targets using basic attacks.
Stage transition goal: Enter Stage 4-10 with fully charged Burst gauges and an active Chain Skill ready for turn one.

Stage 4-10: Humanoid Guardian Mechanics

The Stage 4-10 Humanoid Guardian alternates between standard physical strikes, deploying a defensive barrier, and unleashing an area-of-effect ground slam that deals amplified damage if the barrier remains active. Prolonging the fight triggers the boss's Enrage mechanic, drastically raising its attack power.

Shield phase: When the Guardian activates its barrier, it gains increased debuff resistance and begins charging its ground slam.
Weakness Gauge depletion: Maintaining constant pressure on the boss's Weakness Gauge forces a Break state, resetting its turn meter and canceling charged attacks.
Failure point: Failing to remove the barrier before the charge completes results in severe party-wide damage.

Recommended Team Roles

A balanced team composition counteracts the assassin burst in 4-8 and meets the shield-break demands in 4-10:

Role	Recommended Heroes	Key Responsibility
Primary DPS	Noa, Rin, Luke	Stripping boss barriers and dealing burst damage during Break states
Buffer	Valentine, Tamara	Boosting Action Bar priority and increasing party critical strike rates
Sustain	Tio, Saeran	Dispelling boss debuffs and maintaining frontline health
Defender / Breaker	Veronica, K, Rhona	Absorbing burst attacks, taunting minions, and depleting Weakness Gauges

Noa provides exceptional shield-breaking utility because her critical strike follow-up attacks rapidly deplete both barriers and Weakness Gauges. Pairing Noa with Valentine secures critical hit and attack buffs, while Tio serves as a reactive healer who cleanses incoming debuffs automatically.

Execution Sequence for Stage 4-10

Establish opening buffs: Start the encounter by using your support units to apply offensive buffs to your party and defense reduction to the Guardian.
Hold burst for the shield: Save your main DPS hero's tier-two or tier-three Burst skills until the Guardian deploys its barrier.
Break and Chain: Immediately activate your saved burst abilities to shatter the shield. Once the barrier drops, trigger a full four-hero Chain Skill sequence to force the boss into a Break state.
Finish before Enrage: Exploit the Break window to deal amplified damage, then repeat the sequence to defeat the Guardian before its Enrage timer activates.