Yo, fellow Trailblazers! It's your boi back with another deep dive, and today we're talking about one of the most iconic (and musically inclined) weekly bosses added in Version 2.2: The Great Septimus, the Harmonious Choir. Look, I remember when this guy dropped alongside the finale of Penacony's story. The vibes were immaculate, but so was the challenge for a lot of us. Fast forward to 2026, and he's still a staple for farming those sweet, sweet Trace materials for characters like Boothill and others. Beating him is a rite of passage, and I'm here to give you the full symphony of strategies so you can claim your rewards without breaking a sweat.

🎵 First Things First: How to Unlock This Maestro

You can't just waltz into this concert hall. To unlock the Harmonious Choir: The Great Septimus fight, you absolutely must finish the main Penacony storyline, specifically the "The Fool Always Rings Twice" Trailblaze Mission from Version 2.2. This quest literally forces you to fight him as part of the plot, which is a pretty epic story moment. Once you've seen the credits roll on that saga, congratulations! The boss becomes a permanent fixture in your Echo of War roster, located in the Penacony Grand Theater. Remember, weekly bosses are limited to three attempts per week, so plan your farming sessions wisely if you're building multiple characters.

🎻 Know Your Enemy: The Great Septimus's Weaknesses

This is non-negotiable, Trailblazers. You gotta hit him where it hurts. The Harmonious Choir boss has three very clear elemental weaknesses: Fire, Lightning, and Imaginary.

Why does this matter so much? Let me break it down:

• Toughness Bar Melt: Hitting these weaknesses shreds his Toughness bar WAY faster.

• Free Damage Window: Breaking his Toughness triggers the Weakness Break state. This is your golden ticket! Not only does it make him take more Break Effect and DoT damage, but it also stuns him and pushes his turn way back in the action order. It's a free turn (or three!) to heal up, buff your team, or just go absolutely ham on his HP bar.

• Control is Key: Managing his Toughness bar is the core strategy for this entire fight. Don't sleep on it!

🎼 Crafting the Perfect Orchestra: Best Team Comps for 2026

Alright, let's talk squads. The beauty of this fight in the current meta is the flexibility. You don't need all four characters to match his weaknesses, but your main DPS absolutely should. Your sustain (healer/shielder) and supports can be whatever element you have built best.

Here are some powerhouse team archetypes that still crush it:

Team Archetype	Core DPS Example (2026 Meta)	Key Support/Sustain	Why It Works
Classic Hypercarry	Jiaoqiu (Fire) / Jing Yuan (Lightning)	Ruan Mei, Aventurine	Focuses all firepower on one monster DPS who exploits weakness. Simple, effective, devastating.
Nihility Symphony	Acheron (Lightning)	Black Swan, Gallagher	Acheron is still a top-tier queen. Stacking debuffs and letting her unleash her ultimate is a quick way to end the show.
Follow-Up Frenzy	Dr. Ratio (Imaginary) / Topaz & Numby (Fire)	Robin, Aventurine	The Great Septimus's Toughness bar hates constant aggression. Follow-up teams break it relentlessly.
Break Effect Specialists	Boothill (Physical) / Lingsha (Fire)	Ruan Mei, Gallagher	While Boothill doesn't match a weakness, a well-built Break team can ignore it and shred via Super Break damage.

My personal favorite right now? A Fire-focused team with Jiaoqiu as DPS, paired with Ruan Mei for Break efficiency, Gallagher for healing/breaking, and a flexible slot like Aventurine for shields. It melts his bar and handles the mechanics smoothly.

🎹 The Three-Act Performance: Boss Fight Strategies & Phases

This isn't a mindless DPS race. The Great Septimus has three distinct phases, each with its own mechanics. Pay attention!

Act I: The Opening Movement

• The Gimmick: He summons additional minion enemies. These dudes will try to gang up on a single one of your characters.

• Your Counterplay: This is where control shines. Use your AoE or multi-hit skills to inflict Weakness Break on these adds ASAP. A broken add can't attack. Alternatively, a beefy shield from someone like Aventurine or Fu Xuan makes this mechanic a joke. Don't let them pile up!

Act II: Crescendo of Chaos

• The Gimmick: The boss charges a massive team-wide AoE attack. The damage scales with how many of his summoned adds are still alive. More minions = a world of pain for your squad.

• Your Counterplay: See a pattern? KEEP THE FIELD CLEAN! The strategy from Phase 1 is even more critical here. Smash those adds before he finishes charging. Even breaking them (without killing) reduces the final damage. Also, watch out! He'll sometimes put up a shield that makes his Toughness bar immune. Just weather it and focus on the adds.

Act III: The Finale (DEF-Piercing Solo)

• The Real Danger Zone: The maestro prepares a special, devastating solo attack. Here's the scary part: This attack completely ignores your DEF stat. Your tank's 3000 DEF? Meaningless. This can one-shot squishier characters.

• Your Counterplay: This is the ultimate test of Toughness management. Your #1 priority is to break his Toughness bar BEFORE he launches this attack. A successful Weakness Break will cancel it entirely. Save your big hitting skills or ultimates for this moment to ensure the break. PRO TIP: Don't forget to use the special Trailblazer ability you get during the fight! It deals massive Toughness damage and is perfect for securing that crucial break in the final phase.

🎤 Final Encore & Takeaways

Compared to some of the other weekly bosses, The Great Septimus is more about mechanics than sheer, overwhelming power—if you're prepared. The first two phases are about crowd control and add management. The final phase is a DPS check on his Toughness bar, not just his HP.

My biggest piece of advice? Don't get greedy in Phase 3. As soon as you enter it, go all-in to break his Toughness. Saving your ultimates for a "big HP burn" can backfire if he gets that ignore-DEF move off. A dead DPS does zero damage.

With the right team comp focusing on Fire, Lightning, or Imaginary damage, and by respecting his three-act structure, you'll turn the Harmonious Choir's beautiful symphony into a discordant mess. Now go out there, claim those materials, and build your favorites! Happy trailblazing, everyone! 🚂✨