Guild of Monster Girls: Mearus and Rovilis Boss Guide

To clear high-durability boss trials like Dekaioh MAX in Guild of Monster Girls, deploy Mearus as a backline magic burst dealer and Rovilis as a stationary damage-over-time specialist, anchoring both behind sturdy frontline blockers. Neither character has the defensive stats to survive direct boss cleaves, making careful deployment order and tank positioning mandatory.

Unit Roles and Combat Kits

Added to the roster in September 2022, both units provide specialized offensive vectors against high-health, heavily armored raid targets.

Mearus (Ranged Magic DPS / Crowd Control): Operates from safe deployment tiles, bypassing standard physical armor curves. Her continuous casting delivers burst damage while applying disruptive utility that slows or delays boss attack cadences. She requires uninterrupted uptime to maintain her damage cycles.
Rovilis (Zone Denial / Continuous Status Damage): Establishes an area-of-effect zone that inflicts lingering damage ticks and stat debuffs. Rather than relying on upfront burst, she creates a steady damage floor that continuously drains oversized or stationary targets pinned within her reach.

Sub-Skill Recommendations

Customize both units with sub-skills that match their distinct damage models. Mearus needs rapid skill recycling to maintain burst windows, while Rovilis requires broad coverage and prolonged status uptime.

Unit	Primary Role	Recommended Sub-Skill Focus	Strategic Function
Mearus	Ranged Magic Burst & Disruption	Skill Cooldown Recovery, Magic Attack Up	Accelerates skill cycles and scales single-target damage against armored targets.
Rovilis	Area Denial & Damage Over Time	Status Duration Up, Attack Range Expansion	Extends damage-over-time ticks and expands active field coverage.

Boss Strategy: Dekaioh MAX

Dekaioh MAX tests sustained squad damage against massive health pools and sweeping physical cleaves. Execute the following steps to coordinate Mearus and Rovilis effectively:

Deploy Frontline Blockers First: Place durable guardian units to take initial aggro before placing your casters. Position tanks to pin Dekaioh at a fixed choke point just outside the boss's cleave range relative to your backline.
Anchor the Caster Positions: Deploy Rovilis so her active zone overlaps the boss's stationary tile cluster. Place Mearus on elevated or mid-range backline tiles where her ranged attacks can strike without being clipped by wide-arc boss swings.
Layer Resistance Debuffs: Pair the casters with support allies that strip magic resistance or amplify elemental damage to increase Mearus's burst thresholds and elevate Rovilis's baseline tick damage.
Overlap Healer Auras: Ensure healer range covers both caster tiles to offset unavoidable stage-wide damage pulses during prolonged phases.

Investment Considerations

Mearus and Rovilis are specialized boss-hunting units rather than universal campaign staples. Rovilis struggles against high-speed swarm stages where fast minions rush past before her damage over time can ramp up. Mearus lacks the broad screen-clearing reach of dedicated wave nukers and depends entirely on team protection. Prioritize building versatile frontline defenders and generalist campaign clears before dedicating heavy sub-skill resources to either unit.