Sunday Team Compositions Guide Honkai Star Rail
Discover how Sunday, a five-star Imaginary unit in Honkai: Star Rail, enhances team synergy and transforms support characters into formidable damage dealers, boosting gameplay excitement.
What makes a Harmony character truly shine in Honkai: Star Rail? For Sunday, the five-star Imaginary unit introduced in Version 2.7, the answer lies not just in his individual strength but in how he synergizes with specific team compositions. While Sunday possesses remarkable abilities on his own, his true potential emerges when paired with characters who benefit from his unique turn-advancement mechanics, particularly for summons and follow-up attacks.

The Jing Yuan Renaissance has become one of the most discussed topics in the Honkai: Star Rail community since Sunday's release. Why has this particular synergy generated so much excitement? The answer lies in Sunday's ability to advance a summon's turn, which directly addresses Jing Yuan's primary limitation—the extended intervals between Lightning Lord attacks. This team composition typically features:
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Sunday (Harmony)
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Jing Yuan (Main DPS)
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Robin/Jade (Support)
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Aventurine (Preservation)
How does this team function in practice? Sunday's turn advancement for Lightning Lord creates a relentless assault that excels in both Pure Fiction and Memory of Chaos content. The constant damage output becomes overwhelming for most enemies. While Robin doesn't traditionally synergize well with Jing Yuan, Sunday's intervention allows her to contribute effectively, though energy regeneration remains a consideration. Alternatively, Jade can serve as Robin's replacement, providing Jing Yuan with both increased damage and additional attacks—particularly valuable in Pure Fiction scenarios. Aventurine completes the composition by adding more follow-up attacks while ensuring team survival.

Who would have imagined an Abundance character serving as a viable main DPS? Sunday's transformative support capabilities make this possible with Lingsha, who demonstrates that healers can indeed become formidable damage dealers when properly supported. What makes this composition particularly interesting?
Lingsha possesses inherent damage capabilities through her Skill, Ultimate, and follow-up attack that target all enemies. When built with Critical Rate statistics and supported by Sunday's enhancements, these attacks become significantly more potent. The ideal team structure includes:
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Sunday (Harmony)
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Lingsha (Main DPS/Abundance)
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Jade (Support)
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Robin (Support)
This composition works exceptionally well in Break-effect focused teams, where Lingsha already demonstrates substantial damage potential. However, the challenge lies in acquiring all the necessary support characters, which may not be feasible for every player's account.

While the Lingsha team may seem specialized, the Argenti composition stands as a genuinely viable option for endgame content. Argenti, like many Erudition characters, launched with an impressive kit that nonetheless faced certain limitations. What were these constraints, and how does Sunday help overcome them?
Argenti traditionally struggled with two main issues: dependency on specific support characters and extended periods between Ultimate uses due to high energy requirements. While the first challenge remains, Sunday effectively addresses the second by providing three support units that continuously enhance Argenti's Energy regeneration. The optimal team arrangement features:
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Sunday (Harmony)
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Argenti (Main DPS/Erudition)
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Tingyun (Support)
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Huohuo (Abundance)
An important technical consideration for this composition involves speed tuning: Sunday should have slightly lower SPD than Argenti to maximize the effectiveness of their synergy. This ensures that Argenti receives the benefits of Sunday's support at precisely the right moments during combat sequences.
Each of these team compositions demonstrates Sunday's versatility and transformative potential within various party configurations. Whether revitalizing older characters like Jing Yuan or enabling unconventional DPS options like Lingsha, Sunday's value extends beyond his individual capabilities to how he enhances and enables diverse team strategies. As players continue to experiment with these and other combinations, Sunday's position as a meta-defining support character appears increasingly secure.