Duet Night Abyss Support Synergy Guide: How Buff Stacking Works and the Best Support Combinations

Support synergy in Duet Night Abyss can make or break your team’s total damage output. When used correctly, the right pair of support characters can nearly double your DPS. This guide breaks down how buffs actually interact, what’s multiplicative versus additive, and which support pairings yield the strongest overall performance.

Flat vs. Multiplicative Buffs Explained

Not all buffs scale the same way. Some bonuses add directly to your total stats (flat), while others multiply your existing values (multiplicative).

Example:

• A flat +40% crit chance means your 12% base becomes 52% total.
• A 40% multiplicative bonus means you get 40% of your existing 12%, raising it to about 17% total.

In testing, Daphne’s critical buff behaves multiplicatively, not flatly. This means it scales weaker than expected, especially on characters who already have low base crit. It’s still valuable for crit-focused builds, but not optimal for raw damage stacking.

Damage Buff Hierarchy In Duet Night Abyss

There are three main types of offensive buffs in Duet Night Abyss:

Each buff type multiplies differently in the formula. Stacking different types (Attack + Damage + Weapon Damage) yields stronger results than stacking the same type repeatedly.

Best Support Characters and Their Buff Types In Duet Night Abyss

Truffle and Filbert

• Type: Damage %
• Effect: Grants up to a 61% damage bonus based on HP when using skills.
• Bonus: Provides sustain through healing, refreshing the damage buff during combat.
• Result: One of the strongest and most efficient supports for any team.

Margie

• Type: Attack %
• Effect: Grants up to an 85% attack increase for a limited duration.
• Use Case: Excellent for standard ATK-scaling DPS such as Lynn or Rebecca.
• Note: Does not benefit HP-scaling units like Hellfire.

Main Character (MC)

• Type: Weapon Damage %
• Effect: Provides an additional weapon damage boost during ultimate activation.
• Result: Strong, temporary damage spike. Adds sustain through shield generation.

Daphne

• Type: Crit and Elemental Buff
• Effect: Grants a multiplicative crit chance increase and an Anemo damage bonus on ultimate.
• Ideal Pairing: Works best with Anemo-based characters like Psyche.
• Weakness: Crit scaling is weaker on non-Anemo teams.

Hellfire

• Type: HP-scaling DPS
• Effect: Benefits more from HP-based traits and buffs than attack boosts.
• Tip: Use with sustain supports (Truffle & Filbert) or skill-damage buffers like Tabethe.

Tabethe (ToTh)

• Type: Skill Damage %
• Effect: Boosts self and ally skill damage by up to 16% and improves farming efficiency.
• Strength: Strong early support for clearing mobs and farming commissions.

Best Support Team-ups

Margie + Truffle and Filbert

Best overall combination for attack-scaling DPS.

• Attack % and Damage % stack multiplicatively, yielding near-double damage.
• Provides healing and sustenance.
• Ideal for Lynn, Rebecca, and similar frontliners.

Result Example:

• 15k crit base → 23k crit after both buffs are active.

MC + Truffle and Filbert

High sustain hybrid setup.

• Both provide healing and shields.
• Damage gain is slightly lower due to diminishing returns between two damage-type buffs.
• Works best for survival-heavy content or longer boss fights.

Margie + MC

Weapon and Attack synergy.

• Balanced for consistent output without relying on skill uptime.
• Provides both offensive and defensive support through MC’s shield.
• Works well for gun-focused DPS users.

Daphne + Psyche (Anemo Team)

Crit and elemental synergy setup.

• Daphne grants Anemo damage bonus and crit boost.
• Psyche converts the Anemo scaling into direct damage amplification.
• Strong setup for elemental burst playstyles.

Also Read: Duet Night Abyss: 7 Early Game Mistakes You Must Avoid

Diminishing Returns and Buff Efficiency In Duet Night Abyss

Stacking multiple buffs of the same type (like two damage % sources) will yield lower incremental value due to diminishing returns. This is why the strongest teams combine different buff types rather than doubling the same one.

Efficient buff stacking follows this formula:
Attack % + Damage % + Element/Skill/Weapon % = Maximum Efficiency

Support Role Logic

Every team should include at least one of the following:

1. Sustain Support (healing or shielding)
   Example: Truffle & Filbert, MC
2. Damage Amplifier (attack, weapon, or skill boost)
   Example: Margie, Tabethe, Daphne

A proper team structure balances both sustain and offensive amplification to maintain uptime without interruptions.

Summary Table: Support Buff Comparison

Final Advice

• Use Truffle & Filbert in nearly every setup for their healing and universal damage boost.
• Pair them with Margie for raw power or MC for safety and consistency.
• Avoid doubling the same buff type; combine different multipliers for maximum gain.
• Match support buffs to your DPS scaling (Attack, HP, or Element).

When used correctly, support synergy in Duet Night Abyss can multiply your output by over 50%. Mastering buff combinations and understanding how each type stacks is the key to turning any team into a powerhouse.

Check out more Duet Night Abyss blogs from Gamezop!

• Outsider Guide for Duet Night Abyss: Build, Skills, and Best Setup
• Duet Night Abyss Redeem Codes: All Active Rewards & How to Redeem