Genshin Impact 6.4 Imaginarium Theater Guide: Strategy & Tips

Genshin Impact 6.4 Imaginarium Theater is a challenging endgame mode that tests your roster depth and strategic planning. This guide covers everything you need to know about the Theater’s mechanics, character requirements, enemy lineups, and practical strategies to earn full rewards. If you’re tackling this rotation for the first time or optimizing your clear, this guide will help you understand what to expect and how to prepare effectively.

What is Imaginarium Theater?

Imaginarium Theater is Genshin Impact’s primary endgame challenge mode where players assemble multiple teams to progress through a series of Acts. Unlike other modes, the Theater requires you to manage a limited roster of characters across multiple battles, making team composition and character selection critical to success.

Each season of Imaginarium Theater rotates different mechanics, buffs, and enemy lineups. The Theater provides Fantastical Blessings to all Opening Characters, which offer buffs that persist throughout your run and can significantly impact your performance. 

See Also: Genshin Impact 6.5 Total Pull Count and Banner Pull Guide

How Genshin Impact 6.4 Imaginarium Theater Works

In Genshin Impact 6.4 Imaginarium Theater, the element choices are Electro, Cryo, and Anemo. This combination has minimal synergy, which means you’ll be relying on raw damage output rather than reaction-based strategies. 

The mode requires you to deploy Opening Characters (mandatory selections) and Special Guests (additional support options) as you progress. This structure forces players to think carefully about which characters to use in early Acts versus saving them for harder encounters later. Each character has a limited number of uses, so roster management is everything.

Opening Characters for Genshin Impact 6.4 Imaginarium Theater

The six designated Opening Characters for this rotation are:

• Varesa – One of the most useful characters available. Strong elemental damage and excellent for early Acts.
• Eula – Physical DPS with solid damage output. Trial version is strong enough to clear early Acts.
• Xianyun – Provides valuable support and grouping abilities. Extremely useful throughout the rotation.
• Dori – Support character offering healing and elemental application.
• Mika – Provides buffs and physical damage scaling.
• Sayu – Anemo support with Viridescent Venerer access for elemental damage amplification.

Varesa, Eula, and Xianyun are considered the most useful for this rotation. If you own these characters at reasonable investment levels, prioritize using them strategically rather than burning them out early.

Special Guest Stars for Imaginarium Theater 6.4

Special Guest Stars are premium characters that don’t require elemental type restrictions. If you own these characters, they become invaluable for handling specific boss encounters and Arcana Challenges. The available Special Guests for this rotation are:

• Columbina – One of the most useful Special Guests for this rotation. Her Lunar reaction capabilities make her essential for specific bosses.
• Furina – Freeze team enabler with exceptional damage scaling. Extremely valuable for controlling mobile enemies.
• Durin – Pyro DPS with unique mechanics. Useful for specific encounters where elemental flexibility matters.
• Bennett – Pyro support and buffer. Provides ATK scaling and healing.

If you lack these characters, you can invite them from friends’ Supporting Casts. This is where the community aspect of Imaginarium Theater becomes important. Building relationships with other players who have built these characters can make the difference between clearing and failing.

The Four Bosses in Genshin Impact 6.4 Imaginarium Theater

This rotation features four distinct boss encounters across the Acts. Understanding each boss’s mechanics and weaknesses is crucial for planning your team composition.

Boss 1: Jadeplume Terrorshroom

Weakness: Electro

The first major boss is weak to Electro damage. If you have a properly built Iansan, pairing her with Varesa and Xianyun creates a strong team. The buffs from both Xianyun and Iansan should provide enough damage to clear comfortably.

Alternative Strategy: If you lack Iansan, bring Fischl as your Electro applicator. Fischl’s Oz provides consistent off-field damage and lock-on targeting, making her reliable even without optimal team composition.

Pro Tip: Use Sayu in the fourth slot if you need additional damage. She triggers Viridescent Venerer, which amplifies your team’s elemental damage output.

Boss 2: Battle-Hardened Waveshuttler

Weakness: Freeze or Lunar Reactions

This boss is incredibly mobile, making it one of the most annoying encounters in the rotation. The Freeze mechanic is locked behind premium characters, so this is where Special Guests become critical.

Optimal Strategy: Use your first premium team with Freeze Furina or Lunar Columbina. Freeze helps lock the enemy in place while you dish out maximum damage. Lunar reactions are simply strong enough to brute-force the encounter if Freeze isn’t available.

Alternative Strategy: If you don’t have Furina or Columbina, use Durin paired with Fischl for Overload. Overload interrupts the boss’s movement, allowing you to land more consistent attacks. Kaeya can supplement the team for additional Cryo application and Melt reactions.

Reality Check: This is where roster depth matters. If you have premium teams built, use them here. If not, expect to spend more attempts optimizing your available characters.

Boss 3: Hexadecatonic Battle-Hardened Mandragora

Weakness: Pyro and Grouping Abilities

This boss benefits heavily from grouping abilities. If you have Durin saved from earlier Acts, pair him with Anemo characters like Kazuha, Sucrose, or Venti for their crowd control.

Optimal Strategy: Pyro teams or Electro teams work well here. Durin is the only Pyro option available, but Electro provides more flexibility with multiple viable characters.

Alternative Strategy: Chasca is surprisingly effective against this boss. Her damage scaling corresponds with support elements, allowing for creative team building. Chasca is also extremely valuable for the second Arcana Challenge, so consider saving her if possible.

Pro Tip: Bring characters with good grouping abilities in your arsenal. They help you skip certain Acts by controlling large numbers of weak enemies, preserving stronger character uses for harder encounters.

Boss 4: Perpetual Mechanical Array

Weakness: Single-Target DPS

This is the final boss, and it’s a single-target encounter. Save your best Lunar team for this stage. Characters like Skirk with Furina synergy are optimal, but Flins is also effective if you’ve managed your character uses properly.

Optimal Strategy: Deploy your strongest single-target DPS with proper supports. There are no elemental restrictions, so use whatever your best-built team is.

Alternative Strategy: Since this is the last boss, you should have your most effective single-target team ready. If you can’t beat this boss yet but plan on pulling for Skirk in future banners, you can always retry after she releases.

Reality Check: If you’ve made it to this boss, you’re close to completion. Don’t hesitate to adjust your approach or even restart if your character selection RNG wasn’t favorable in earlier Acts.

Arcana Challenges in Genshin Impact 6.4 Imaginarium Theater

Arcana Challenges are special encounters available in Lunar Mode after you’ve consumed enough Vigor from using characters. These challenges can be completed without losing Vigor or failing your run, making them optional but rewarding.

First Arcana Challenge

Mechanics: Requires consistent team rotations and proper rhythm management.

You need a well-coordinated team with proper rotations to defeat enemies as soon as they spawn. Allowing enemies to move reduces your AOE potential and makes the encounter significantly harder.

Recommended Team: Flins works extremely well here. The guide author used a Level 70 Flins with Level 1 talents, demonstrating that investment level matters less than team synergy. Pairing Flins with Columbina creates strong synergy.

Alternative Strategy: Any team with shields for interruption resistance can brute-force this challenge. Characters like Lan Yan, Beidou, Kaeya (C4), Diona, Citlali, and Ineffa provide reliable shields for survivability.

Second Arcana Challenge

Mechanics: Enemies require Nightsoul or high-frequency elemental attacks to break shields.

This challenge is where Nightsoul characters shine. Chasca and Varesa are the most effective due to their big damage output and Nightsoul attacks. Not many characters can efficiently break the enemy shields, making character selection critical.

Recommended Characters: Chasca and Varesa are your top picks. Other Nightsoul-aligned characters that work well include Ororon, Citlali, Ifa, and Iansan.

Alternative Strategy: Use Anemo characters for Swirl infusion to handle elemental hits. Viridescent Venerer amplifies your main DPS damage, and flexible team slots allow you to trigger favorable reactions.

Pro Tip: If you don’t have Chasca, invite her from a friend’s Supporting Cast. She’s one of the best characters for this specific challenge, making the trade-off worth it.

See Also: Complete Genshin Impact Characters List 2026: v6.3 Tier List & Ascension Guide

Strategy and Gameplay Tips

Manage Your Character Uses Wisely

Each character has a limited number of uses (15 total per season), so avoid using your strongest characters on easy early Acts. Save your best damage dealers and supports for Acts 8 and beyond, where enemies are significantly harder.

The meta approach is to use your weakest viable teams on non-boss Acts while reserving premium characters for specific boss encounters and Arcana Challenges.

Use Trial Characters Strategically

Trial Eula is strong enough to easily complete Act 1 with Dori for Superconduct. She can barely finish Act 2 if the enemy doesn’t move around too much. Use her early, as she’s useless in other stages where Electro and Cryo synergy doesn’t apply.

Plan for RNG

Character invitation RNG can make or break your run. You might not get the perfect characters invited at the right times. Expect to rewind your performance occasionally to get better RNG, especially in later Acts where specific character types become critical.

Prioritize Grouping Abilities

Bring at least one character with good grouping abilities in your arsenal. They allow you to skip certain Acts by controlling large numbers of weak enemies, which preserves stronger character uses for harder content.

Handle Shield Mechanics

Certain Acts have gimmick enemies with shields. Act 7 features Frostnight Scions, for example. Keep an Electro or Cryo support ready to break shields before you start dealing damage. This prevents wasting your main DPS’s time on shield breaking.

Invite Characters Whenever Possible

Maximize what little team synergy is available by inviting characters whenever the option appears. More characters in your roster means more flexibility for future Acts.

Rewards from Imaginarium Theater 6.4

Completing all Acts rewards you with valuable progression materials. The primary rewards include Stella Fortuna (used for character Constellation leveling), Lunar Arcanums (new materials for character enhancement), Mora, and Talent books.

Full clears provide significantly more rewards than partial clears, making the effort to optimize your run worthwhile. Plan your character uses carefully, and you’ll have access to all the rewards this rotation offers.

See Also: Genshin Impact 6.5 New Map Deep Dive: Size, Details & Lore

Genshin Impact 6.4 Imaginarium Theater is genuinely one of the game’s most demanding endgame challenges. The element combination is intentionally difficult, and the boss lineup requires both strategic planning and roster depth. You’ll need to think about character uses several Acts in advance, manage RNG carefully, and sometimes accept that restarting is better than pushing forward with a suboptimal character selection.

The good news is that it’s entirely clearable with proper preparation. Build your roster around the available elements, plan your character uses for later Acts, and don’t be afraid to restart if your early invitations don’t align with your strategy. The community aspect of borrowing Supporting Cast characters from friends can make the difference between clearing and struggling.

If you’re planning to strengthen your roster for future Imaginarium Theater rotations or pull for characters that might appear in upcoming banners, having sufficient premium currency on hand is always helpful. Top up Genshin Impact Primogems on Joytify!