Octopath Traveler: Champions of the Continent - Arena Grossam Boss Guide

This is strategy information for Octopath Traveler: Champions of the Continent. This guide explains how to defeat Arena Grossam. NPC Grossam in front of the Victor Hollow Weapons Shop here: NPC Grossam Weaknesses & Strategy Guide I also tried making a video. It got a bit messy at the end, but it's a video of the subjugation. YouTube Strategy Reference Video here: Grossam Subjugation! Weaknesses, Tips, and Strategy Info

Grossam and Other Dancers' Weaknesses / Basic Info

Name	Weakness	Shield
Grossam	Spear, Axe, Dark	26
Passionate Dancer	Sword, Axe, Wind, Dark	12
Dazzling Dancer	Sword, Axe, Wind, Dark	14

Common weaknesses include Axe and Dark. While not a weakness, for shield breaking, a Thief's shield-ignoring attack is recommended.

Grossam's Actions

Basic Actions

Action	Effect
Impact	Single-target physical attack - Forcibly swaps with back row
Poem of Heavenly Thunder	Random 3-hit Lightning attack
Wild Dance	Random 3-hit physical attack
Warrior's Inspiration	Physical attack and Physical Defense Up for all enemies

After Grossam is alone? The following skills are added

Dance of Decaying Defense	AoE physical attack - Physical Defense Down
Repeated Impact	2-hit physical attack - Forcibly swaps with back row

Used/added when HP is around half or less

Now I'll get serious	Grossam will now act twice per turn
Poem of Fierce Thunder	AoE Lightning attack

Used when HP is around 20% remaining

Stance of the Elegant Warlord	Physical Attack, Elemental Attack, Speed, Physical Defense Up Nullifies weaknesses other than Dark (can be removed by breaking)
Dance of Destruction	Random 4-hit physical attack

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Passionate Dancer & Dazzling Dancer Actions

Passionate Dancer

Primarily physical attacks, Critical & Speed Up

Dazzling Dancer

Primarily Light elemental attacks, Light Resistance Down, Elemental Attack & Elemental Defense Up

Roughly, it's like this.

Grossam Strategy Tips

Battle Start

Defeat the adds first

Maintain debuffs, buffs, and auto-healing. Debuffing Grossam is especially effective.

It will be a long battle, so SP recovery accessories are essential.

Grossam's HP below half

Grossam acts twice per turn and attacks become more intense, but it shouldn't be as bad as at the start of the battle.

Similar to the first half, maintain debuffs, buffs, and auto-healing. Debuffing Grossam is especially effective.

When HP enters the red zone, pay attention to the timing of your Break. Ideally, you want to let him use Stance of the Elegant Warlord when his HP is in the single digits.

Grossam's HP below 20%

Only Dark remains a weakness

Spear and Axe also become weaknesses again upon Break

↓It got a bit messy at the end, but I made a video. YouTube Strategy Reference Video here: Grossam Subjugation! Weaknesses, Tips, and Strategy Info

Video Content Explanation

Party Composition and Skill Selection

Fiore

For shield breaking, "Triple Slash"; for damage dealing, "Collapse Charge"

I tried "Dark Surge" thinking it might be useful for AoE.

Lionel

Basically only uses "Guardian Rage"

Gilderoy

This time, I didn't use "Desperate Resolve" or "Heal Spike," but if he's sufficiently trained as a tank, these might be more stable.

With Bolt Spike, if he gets paralyzed early, consider it lucky.

Shield breaker once Grossam is alone

Viola

"Anti-Attack," "Anti-Guard," "Double Wide Burst" are recommended!

Constantly debuff Grossam

AoE shield breaking with "Double Wide Burst"

Note: I forgot to swap skills in the video

Theo

"Trident Slash," "Secret Healing," "Double Harvest" are recommended!

Early on, "Double Harvest"; when Grossam is alone, "Trident Slash"

AoE auto-healing with "Secret Healing".

Note: I forgot to swap skills in the video

Tressa

Shield breaker

Sofia

Was barely useful. I'd like to swap her for another character. → Perhaps Milord or similar as an AoE buffer/healer.

Molrusso

Auto-healer

Characters who were strong in the Grossam battle

Fiore: Deals satisfying damage. Viola: Essential as a debuffer and shield breaker. Theo: Breaker and healer.

Mid-tier

Gilderoy: Because I didn't use him as a tank this time. Molrusso: Auto-healer, Wind elemental damage. Tressa: Shield breaker. Lionel: High value due to his ability to defeat adds quickly.

Reflections/Lessons Learned

This time, I challenged with a party that had various issues, such as forgetting to swap skills for Viola and Theo, and Sofia being somewhat underwhelming. I would like to swap Sofia for another character. Also, breaking Grossam right before his HP dropped below 20% was not ideal. Once his HP turns red, try to manage without breaking him... NPC Grossam in front of the Victor Hollow Weapons Shop here: NPC Grossam Weaknesses & Strategy Guide ::License Information:: © 2020 SQUARE ENIX CO., LTD. All Rights Reserved.