M3S Brute Bomber Raid Guide – Arcadion Light-Heavyweight (FFXIV)

Expansion: Dawntrail
Raid Series: Arcadion
Raid Tier: Light-Heavyweight
Boss: Brute Bomber
Encounter: M3S (Savage)
Players: 8 (2 Tanks / 2 Healers / 4 DPS)
Duty Finder Type: Savage Raid

Unlock Requirement: Clear M3N Brute Bomber
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Encounter Overview

Brute Bomber (Savage) expands heavily on the normal encounter with complex positioning mechanics, bomb fuse management, and multi-phase arena control.

The fight introduces:

• large-scale knockback tower puzzles
• clone dash mechanics
• player-based fuse detonations
• bomb disarm coordination
• chained mechanics requiring precise positioning

As the fight progresses, Doping Draught repeatedly enhances the boss and increases raid damage pressure.

The arena is surrounded by a fire barrier that instantly kills players who touch it, making knockback positioning critical.

Arena Overview

The arena is square and bordered by lethal fire.

Key arena elements include:

• tower knockback mechanics
• fuse bombs around the arena
• a central puddle during Fusefield
• safe-zone positioning during bomb patterns

Falling into the border results in immediate death.

Strategy Foundation

Before the encounter begins, the party should establish:

Clock Positions

• Tanks / Healers on cardinals
• DPS on intercardinals

Light Parties

• Tank + Melee DPS
• Healer + Ranged DPS

Several mechanics require partner stacks or role-based spreads.

Phase 1 Mechanics

Brutal Impact

Four hits of raid-wide physical damage.

Response

• use mitigation
• heal through hits

Knuckle Sandwich

Main tank tankbuster dealing four hits of physical damage.

Split-damage attack.

Response

• share between tanks with mitigation
OR
• main tank uses invulnerability

Each hit targets the highest enmity player, so threat changes can cause deaths.

Quadruple Lariat / Octuple Lariat

The boss simultaneously casts a point-blank AoE, forcing players out of melee range.

Quadruple Lariat

Conal AoE targeting all supports or all DPS.

Players must stack with their assigned partner.

Octuple Lariat

Conal AoE targeting all players.

Players must spread to clock positions.

Both attacks inflict Physical Vulnerability Up.

Quadroboom Dive / Octoboom Dive

The boss jumps to a wall and deals proximity damage.

Quadroboom Dive

Split damage circle AoE targeting all supports or DPS.

Players stack with partners.

Octoboom Dive

Circle AoE on all players.

Players spread.

Barbarous Barrage

Six knockback towers spawn.

Tower Structure

• Middle towers → require 4 players
• Corner towers → require 2 players

Middle towers resolve first.

After knockback, players are pushed toward the corner towers.

Afterward:

• an 8-person tower spawns in the center

Players must aim their knockback toward it.

The boss then casts Murderous Mist, a 270-degree cleave.

Players should be knocked behind the boss.

Doping Draught

The boss gains Dangerously Doped.

Effects:

• +10% damage
• enhanced mechanics for the rest of the encounter

Phase 2 Mechanics

Enhanced Lariat

The boss may be on fire, altering the mechanic.

Instead of a point-blank AoE, the boss uses a donut AoE.

Players must stay inside melee range.

Enhanced Dive

The dive now produces a knockback instead of proximity damage.

Players should:

• pre-position
• use knockback immunity

Brutal Impact (Enhanced)

Now six hits of raid-wide damage.

Knuckle Sandwich (Enhanced)

Now six hits.

Invulnerability should be used late in the cast bar.

Tag Team

Two Brute Distortion clones appear.

Each player receives:

Chain Deathmatch

Players must be hit by their tethered clone to cleanse the debuff.

Clones perform Brutal Lariat dashes covering two-thirds of the arena.

Players must:

• be hit by their tethered clone
• avoid the other clone

After the first dash:

• clones dash again

Safe corner is the one initially hit by both dashes.

Final Fusedown

Eight bombs spawn.

Players also receive short or long fuses.

Supports and DPS receive opposite fuse lengths.

Players explode with Explosion, applying Magic Vulnerability Up.

Bomb Pattern

Two possible layouts:

• long fuses NE corner
• long fuses SW corner

Resolution

Short fuse players:

• spread near long bombs

Long fuse players:

• stack in the center safe diamond

After short explosions resolve:

Roles swap positions to resolve long fuses.

Fusefield

Bomb fuses appear on cardinals and intercardinals.

Players receive Bombarium debuffs (short or long duration).

Each fuse creates a Sinister Spark moving toward the center puddle.

If a spark reaches the puddle:

Raid wipe.

Players must disarm sparks matching their debuff timer.

Each disarm triggers:

Mana Explosion raid damage

Explosions must be spaced to avoid lethal stacking damage.

Second Doping Draught

Boss gains:

• second Dangerously Doped stack
• Doped and Detonative buff
• enlarged hitbox

Phase 3 Mechanics

Bombarian Special

Five hits of raid-wide physical damage.

Followed by:

• point-blank AoE
• donut AoE

Players must:

1. move out

2. move in

Boss then performs large knockback belly flop.

Players are knocked toward corners.

Then resolve:

• partner stacks (Quadroboom)
• spreads (Octoboom)

Tag Team + Bomb Pattern

Bombs spawn again.

Players must:

• dodge short bombs
• cleanse Chain Deathmatch from clone and boss

Players must be hit by:

• their clone dash
• the boss’s 270° cleave

Failure causes death.

Infernal Spin

Rotating cone AoE.

Two sets of expanding Explosive Rain donut AoEs appear.

Players dodge by moving into the first cone section.

During fuse ignition:

• tanks/melee spread cardinals
• healers/ranged spread intercardinals

Barbarous Barrage (Final)

Towers resolve similarly to Phase 1.

However, the boss also performs Lariat Combo dashes.

Players must position knockbacks to avoid the cleave direction.

Third Doping Draught

Boss gains:

• third Dangerously Doped stack
• enlarged hitbox

Enrage

Special Bombarian Special

Heavy raid-wide damage sequence.

Players must dodge:

• point-blank AoE
• donut AoE

Afterwards the boss becomes untargetable and wipes the party with an unavoidable knockback.

Role Pressure Analysis

Tanks

Heavy tankbusters and positioning responsibility during knockback towers.

Healers

Frequent raid-wide damage and stacked Mana Explosion damage.

DPS

Fuse management and positioning precision are critical to prevent chain wipes.

Difficulty Profile

M3S is the mechanical centerpiece of the Light-Heavyweight tier, combining bomb mechanics with positional puzzles.

Related Encounters

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