Reverse 1999 Mr. Duncan build guide: Skills, best Psychubes, Insight materials, and more

Mr. Duncan is the latest 5-star Arcanist to debut in the Reverse 1999 version 2.2 update. Armed with DPS, reaper, and riposte tags, he belongs to the Beast Afflatus and deals Reality damage with his incantations. Duncan can trigger the counter effect with Makeshift Inventions (Basic Skill 2), which attacks enemies before they can cast their skills.

Duncan can also generate various effects with the Bullets effect, such as critical rate buff, Reality defense debuff, and more. This article provides the skill explanation, best teammates, Psychubes, and Insight Materials for the best Duncan build.

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Reverse 1999 Mr. Duncan build guide: Skills explanation

Here is the skills explanation of Mr. Duncan in Reverse 1999:

• Lethal Melody (Basic Skill 1): Duncan deals 70%/105%/175% damage to two enemies with one/two/three-star cards. Additionally, she deals Genesis damage equal to 60%/90%/150% with one/two/three-star cards to enemies with HP below 50%.
• Makeshift Inventions (Basic Skill 2): Duncan gains 2/3/5 bullets from Veteran’s Cartridge with one/two/three-star cards. He also enters the Quick Draw status for two rounds with all-star cards.
• A Veteran’s Regards (Ultimate Skill): Duncan deals 500% damage to a single enemy and gains a 10% critical rate buff for each type of Bullet he holds.

Explanation of Duncan’s status effects

• Quick Draw: If Duncan has Bullets, he casts Swift Riposte before receiving an attack.
• Swift Riposte: It deals 200% Reality damage to the enemy that attacks Duncan.
• Veteran’s Cartridge: It contains Acidic and Fragmented Bullets.

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Reverse 1999 Mr. Duncan build guide: Best Psychubes

Best Psychubes for Duncan (Image via Bluepoch)

Here are the best Reverse 1999 Psychubes for Mr. Duncan:

• Outside the City (6-star): After Duncan casts Swift Riposte, his critical damage buffs by 5% (can stack up to 10 times). He gains an 8% critical rate at max stacks.
• Luxurious Leisure (6-star): After Duncan casts his ultimate skill, his damage dealt increases by 9% (can stack up to three times).
• Thunderous Applause (6-star): His critical damage increases by 32% when he scores a critical hit with one-target attacks.
• Brave New World (6-star): The incantation might of his next skill after casting his ultimate skill increases by 40%.

Outside the City is the best Psychube for Duncan; Timekeepers are advised to use it for the best results. They can use other Psychubes as alternatives to Outside the City.

Note: The value of Psychubes is at the max level.

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Reverse 1999 Mr. Duncan build guide: Insight Materials and Inheritance effects

Duncan's Insight effects (Image via Bluepoch)

Mr. Ducnan’s Inheritance is called Military Experience, which increases his ultimate might, grants Bullets to allies, and more. Here are the materials required to upgrade it and its effects at each Insight level:

Insight I: Duncan gains one Ceremonious whenever an ally activates the Bullets effect twice. Ceremonious grants 3% ultimate might. It can stack up to 100 times, can’t be dispelled, and is removed after using the ultimate skill.

Required materials:

• 12000 ✕ Sharpodonty
• 6 ✕ Page of Beastly Thirst
• 4 ✕ Spell of Banishing
• 4 ✕ Milled Magnesia

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Insight II: He gains a 10% critical rate buff, upon entering the battle.

Required materials:

• 30000 ✕ Sharpodonty
• 8 ✕ Scroll of Beastly Thirst
• 4 ✕ Perpetual Cog
• 3 ✕ Biting Box

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Insight III: All teammates gain one type of Bullet from the Veteran’s Cartridge whenever Duncan scores a critical hit or defeats an enemy. He gains one Moxie after scoring three critical hits.

Required materials:

• 120000 ✕ Sharpodonty
• 12 ✕ Tome of Beastly Thirst
• 4 ✕ Wyrmling Skeleton
• 2 ✕ Mistilteinn

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Reverse 1999 Mr. Duncan build guide: Best teams

Tooth Fairy is one of the best teammates for Mr. Duncan (Image via Bluepoch)

Timekeepers can use Mr. Duncan as a sub-DPS in a team. Here is the list of the best Reverse 1999 arcanists that synergize excellently with Duncan:

• Lopera
• J
• Tooth Fairy
• Kakania
• Isolde
• Semmelweis
• Vila
• Lucy
• Ms. NewBabel

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That concludes our Reverse 1999 build guide for Mr. Duncan.