characters dr. ratio

Dr. Ratio

HuntImaginary5★
Last updated: 30/04/2025
Doctor of Truth

“The most annoying thing about idiocy is that you can’t explain it to an idiot.”

Should You Pull for Dr. Ratio?

Main DPS

Dr. Ratio is an Imaginary DPS on the Path of The Hunt who focuses on single targets and gets most of his damage from Follow-up ATKs. The more debuffs an enemy has, the harder he hits, which makes him a natural boss killer. That said, his damage multipliers are low compared with version 3 characters, so he is no longer one of the first picks to carry a team.

A good fit if you already own Dr. Ratio and have a few debuffers like Silver Wolf, Pela or Jiaoqiu, or Robin and Topaz & Numby for a follow-up team. If you are looking for a new long-term DPS, think it over carefully before pulling.

Memory of Chaos Strong He still handles single-target bosses well, but his damage multipliers are low compared with version 3 characters.
Pure Fiction Decent This mode is all about big enemy waves, and Dr. Ratio only has a little multi-target ability, since he is a single-target character at heart.
Apocalyptic Shadow Strong His Follow-up ATKs deal good Toughness damage, but his damage multipliers are low compared with version 3 characters.
Pros & Cons

Pros

  • Very good single-target damage
  • His follow-up attacks deal high Toughness damage
  • Plenty of strong Relic options to choose from
  • Some ability to handle multiple targets
  • Easy to build CRIT stats thanks to traces that grant a good amount of CRIT Rate

Cons

  • Low damage multipliers compared with version 3 characters
  • His Ultimate costs a lot of Energy
  • Needs at least 3 debuffs on the target for his follow-up attacks to be consistent
  • Beyond a little multi-target ability, he is ultimately a single-target character

Best Dr. Ratio Build Guide

Best Dr. Ratio Build

Dr. Ratio scales off CRIT and ATK. His Traces already give him a good amount of CRIT Rate, so building his CRIT stats is fairly easy. His teams usually throw out a lot of Follow-up ATKs, so pick Planar Ornaments that reward that playstyle.

Best Light Cones

  • 1 Baptism of Pure Thought Baptism of Pure Thought Best
    His signature Light Cone and the best choice, as long as you can keep 3 debuffs on the enemy. After he uses his Ultimate, his Follow-up ATKs also gain DEF ignore. It gets even stronger with DEF shredders like Pela or Silver Wolf on the team.
  • 2 Worrisome, Blissful Worrisome, Blissful Great
    Weaker than his signature but still a solid option. It raises his CRIT Rate and Follow-up ATK DMG, and it puts its own debuff on the enemy that helps allies who attack that target. That debuff also counts as 1 debuff for Dr. Ratio.
  • 3 In the Night In the Night Good
    Gives CRIT Rate, and the rest of its DMG bonus scales with SPD. To get the most out of it you need to move some of your stats into SPD, and it gets better the more SPD your relics and team give him.
  • 4 Cruising in the Stellar Sea Cruising in the Stellar Sea Good
    Raises his CRIT Rate and gives him an ATK boost whenever he defeats an enemy.
  • 5 See You at the End See You at the End Stopgap
    A 4-star Light Cone that raises his CRIT DMG and Follow-up ATK DMG. Use it as a stopgap until you get one of the options above.

Best Relics

1
The best set. It increases his DMG against debuffed enemies, and the 4-piece effect gets stronger after he uses his Ultimate. Dr. Ratio applies a debuff of his own with his Skill, so this set is very easy to activate.
2
The second choice. It raises his CRIT stats when the target is debuffed, which works especially well if your team has a dedicated debuffer.
3
A decent set to use for now, since Dr. Ratio fights with Follow-up ATKs and also deals damage with his Ultimate.

Best Planar Ornaments

1
The best set. Every time an ally uses a Follow-up ATK, Dr. Ratio gains Follow-up ATK DMG and CRIT DMG, and all of his teams have plenty of follow-up attacks.
2
Gives a lot of CRIT Rate, but only when there is another The Hunt character on the team.
3
Boosts his Follow-up ATK and Ultimate DMG. The CRIT Rate requirement is easy to reach because his Traces already give him a good amount.

Main Stats

  • BodyCRIT Rate or CRIT DMG
  • FeetSPD or ATK%
  • Planar SphereImaginary DMG Boost or ATK%
  • Link RopeATK%

Substats

  • 1SPD (up to your breakpoint)
  • 2CRIT Rate
  • 3CRIT DMG
  • 4ATK%

On the Body, CRIT Rate or CRIT DMG both work, so take whichever balances your stats. On the Feet, SPD and ATK% are both usable, but SPD comes first. For the Planar Sphere, go for Imaginary DMG Boost, with ATK% as an acceptable backup. The Link Rope is simply ATK%.

If you play around a SPD breakpoint such as 134, reach it first. If you keep him at base SPD, put everything into CRIT. The two CRIT stats are equally important. ATK% comes last, nice to have once the rest is done.

Stat Targets

  • CRIT Rate70% or more outside of combat, around 90% to 100% counting his own in-combat buffs
  • CRIT DMG150% or more outside of combat, around 180% to 200% counting his own in-combat buffs
  • ATK2600 or more, 2700 to 3100 if you invest heavily
  • SPDBase SPD, or 134 (recommended), 143, 161

Skill Priority

Talent > Skill = Ultimate > Basic ATK

Most of Dr. Ratio's damage comes from Follow-up ATKs, so level his Talent first. Skill and Ultimate are about even. If you have to choose, level the Skill slightly earlier, since it is what you use whenever the Ultimate is not ready. Basic ATK goes last because his Skill deals far more damage.

Trace Priority

Summation > Deduction > Inference

Summation gives CRIT Rate and CRIT DMG stacks that last the whole battle, Deduction increases his DMG when the enemy has 3 or more debuffs, and Inference lets him apply 1 extra debuff by himself.

Eidolon Priority

E2 is a great value stopping point

E1 Pride Comes Before a Fall raises the Summation stack limit to 10 and gives him 4 stacks right at the start of battle, which means an instant 10% CRIT Rate and 20% CRIT DMG. E2 The Divine Is in the Details adds Imaginary Additional DMG to his Follow-up ATKs based on how many debuffs the enemy has. E6 is also very strong: it adds 1 more Wiseman's Folly trigger and increases the DMG of his Talent's Follow-up ATK by 50%.

Best Dr. Ratio Teams

Best Follow-up Team

Replace Cipher with: Topaz & Numby, Moze Replace Robin with: Silver Wolf, Pela, Ruan Mei Replace Aventurine with: Luocha, Fu Xuan, Gallagher

Dr. Ratio's team should have one buffer and one debuffer, and the debuffer matters most because it keeps his Follow-up ATKs going. Cipher adds extra damage to the team, while Topaz & Numby increases his Follow-up ATK DMG. If you have Aventurine, run Robin to boost the whole team's follow-up damage. Without him, swap in Silver Wolf to pile lots of debuffs on the enemy.

Budget Team (All 4-Stars)

A hypercarry team where everything goes into Dr. Ratio as the main DPS. March 7th (The Hunt) buffs him and adds extra damage, while Asta raises his SPD and has a chance to Burn the enemy. Natasha keeps the whole team healed.

Mono-Imaginary Team

Replace Silver Wolf with: Welt Replace Aventurine with: Fu Xuan, Lynx

Use this team in fights where enemies are weak to Quantum but not to Imaginary. Silver Wolf is a must here, because she implants an Imaginary Weakness on the enemy. If the enemy is already weak to Imaginary, swap Silver Wolf for another debuffer such as Welt.

Best Teammates for Dr. Ratio

Robin
Robin

The top choice for the buffer slot in any follow-up team, which makes her a great match for Dr. Ratio.

Topaz & Numby
Topaz & Numby

Applies one of the debuffs Dr. Ratio's Skill needs. With her E1 or her signature Light Cone, she can fully cover his debuff needs. When Dr. Ratio's Follow-up ATK hits the target Topaz has marked, Numby also gets its action advanced.

Silver Wolf
Silver Wolf

Applies a huge number of debuffs, almost enough by herself to keep his Follow-up ATKs firing every time and push his debuff-based DMG bonus to the top. She can also implant an Imaginary Weakness on enemies.

Jiaoqiu
Jiaoqiu

Brings 2 debuffs he can keep up almost permanently, plus 1 more from his Light Cone. With Jiaoqiu handling debuffs, you have much more freedom choosing the buffer and sustain.

Moze
Moze

A 4-star character who uses Follow-up ATKs. The state Moze puts on an enemy counts as a debuff, and Moze wants teammates who attack as often as possible, so the two cover each other's needs very well.

Pela
Pela

The easy-to-get version of Jiaoqiu, applying debuffs and shredding enemy DEF. With Resolution Shines As Pearls of Sweat equipped, she adds another DEF reduction debuff.

Cipher
Cipher

Adds extra damage to the team and pairs very well with Dr. Ratio.

Aventurine
Aventurine

A sustain who also uses Follow-up ATKs and puts a debuff on enemies that makes them take more CRIT DMG. With his signature Light Cone he applies even more debuffs.

Dan Heng • Permansor Terrae
Dan Heng • Permansor Terrae

Shields the whole team and buffs the ATK of one ally. He does not apply debuffs for Dr. Ratio, though, unless he equips a Light Cone that applies them.

Guinaifen
Guinaifen

Her Burn and her Firekiss both count as debuffs, which helps Dr. Ratio launch Follow-up ATKs consistently. At E1, her Skill also lowers the enemy's Effect RES.

How to Play Dr. Ratio

Keep 3 Debuffs on the Target

Every time he uses his Skill, his Talent Cogito, Ergo Sum has a 40% fixed chance to launch a Follow-up ATK, and each debuff on the target adds 20% to that chance. In practice, if the enemy has 3 or more debuffs, every Skill comes with a Follow-up ATK. His Trace Inference makes his Skill lower the enemy's Effect RES, so your teammates only need to bring 2 more. Keep in mind that this debuff is applied after the chance is checked, so if it is your 3rd debuff, the first follow-up is not guaranteed.

Use the Ultimate on a Long-Lived Target

His Ultimate Syllogistic Paradox applies Wiseman's Folly to the enemy. When allies attack that target, Dr. Ratio automatically launches a Follow-up ATK, up to 2 times. Wiseman's Folly is not a debuff, and it disappears when the enemy dies instead of jumping to another enemy. His Ultimate costs a hefty 140 Energy, so aim it at the boss or the tankiest enemy so it does not go to waste.

Stacking Summation and Deduction

His Trace Summation gives 1 stack for each debuff on the target when he uses his Skill. Each stack adds 2.5% CRIT Rate and 5% CRIT DMG, up to 6 stacks, and they last for the whole battle. You do not need to get them all at once: against an enemy with 3 debuffs, 2 Skill uses fill all 6 stacks. Deduction adds 10% DMG per debuff when the enemy has 3 or more, up to 50% at 5 debuffs. Hitting 3 debuffs so his follow-up always fires is the part that matters most, so do not bend your team out of shape just to reach 5.

Energy and Toughness

Because he follows up so often, Dr. Ratio's Energy gain is pretty good: each Talent Follow-up ATK gives 5 Energy, each Skill against an enemy with 3 or more debuffs gives 35 Energy, and his Ultimate gives an extra 10 once all Wiseman's Folly triggers are used up. His Follow-up ATKs also deal a lot of Toughness damage, so he breaks enemies fairly quickly.

Quick Tips

  • A debuff is any status with a small red arrow pointing down on its icon. If you are not sure, open the enemy details window in combat to see how many debuffs they have.
  • Not every effect placed on an enemy is a debuff. For example, one of the effects Hanya applies to enemies does not count.
  • Use his Technique before a fight: it creates a special dimension that Taunts nearby enemies, and enemies you start a battle with inside it have their SPD reduced by 15% for 2 turns.
  • If you have not farmed a good 4-piece set yet, mix 2-piece bonuses from Pioneer Diver of Dead Waters, Scholar Lost in Erudition, Musketeer of Wild Wheat, Prisoner in Deep Confinement, The Wind-Soaring Valorous and Wastelander of Banditry Desert.
  • If his Skill target dies before the Follow-up ATK goes off, the follow-up hits a random enemy instead, so feel free to clear out small enemies.

Dr. Ratio Skills

Basic ATK

Mind is Might

[Single Target]
Energy Generated20
Toughness Break Single Target: 10

Deals Imaginary DMG equal to 140% of Dr. Ratio’s ATK to one designated enemy target.

Lv. 10

Upgrade Materials

Lv. 1 to Lv. 10

Intellectual Midwifery

[Single Target]
Energy Generated30
Toughness Break Single Target: 20

Deals Imaginary DMG equal to 188% of Dr. Ratio’s ATK to one designated enemy target.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Syllogistic Paradox

[Single Target]
Energy Generated5
Toughness Break Single Target: 30

Deals Imaginary DMG equal to 288% of Dr. Ratio’s ATK to one designated enemy target and applies “Wiseman’s Folly.” When Dr. Ratio’s teammates attack a target afflicted with “Wiseman’s Folly,” Dr. Ratio launches 1 instance of his Talent’s Follow-Up ATK against this target.
“Wiseman’s Folly” can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio’s Ultimate. This trigger count resets after Dr. Ratio’s Ultimate is used.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Cogito, Ergo Sum

[Single Target]
Energy Generated5

When using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 338% of Dr. Ratio’s ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Mold of Idolatry

Energy Generated20

After using Technique, creates a Special Dimension that Taunts nearby enemies, lasting for 10 second(s). After entering battle with enemies in this Special Dimension, there is a 100% base chance to reduce each single enemy target’s SPD by 15% for 2 turn(s). Only 1 Dimension Effect created by allies can exist at the same time.

Dr. Ratio Traces

Total Trace Bonuses
  • ATK % +28%
  • Tỷ Lệ Bạo Kích +12%
  • DEF % +12.5%

Dr. Ratio Eidolons

Pride Comes Before a Fall
Eidolon 1

The maximum stackable count for the Trace “Summation” increases by 4. When a battle begins, immediately obtains 4 stacks of Summation. Needs to unlock Summation first.

The Divine Is in the Details
Eidolon 2

When his Talent’s Follow-Up ATK hits a target, for every debuff the target has, deals Imaginary Additional DMG equal to 20% of Dr. Ratio’s ATK. This effect can be triggered for a maximum of 4 time(s) during each Follow-Up ATK.

Know Thyself
Eidolon 3

Ultimate Lv. +2, up to a maximum of Lv. 15.
Basic ATK Lv. +1, up to a maximum of Lv. 10.

Ignorance Is Blight
Eidolon 4

When triggering the Talent, additionally regenerates 15 Energy for Dr. Ratio.

Sic Itur Ad Astra
Eidolon 5

Skill Lv. +2, up to a maximum of Lv. 15.
Talent Lv. +2, up to a maximum of Lv. 15.

Vincit Omnia Veritas
Eidolon 6

Additionally increases the trigger count for “Wiseman’s Folly” by 1. The DMG dealt by the Talent’s Follow-Up ATK increases by 50%.

Stats Base

Lv. 80
  • HP Base—
  • ATK Base—
  • DEF Base—
  • SPD—
  • Taunt—

Ascension Materials

20304050607080

About Dr. Ratio

Other Names
Veritas Ratio
Path story
Erudition
World
Cosmic
Signature Light Cone
Baptism of Pure Thought
Debut Banner
* Panta Rhei * Dr. Ratio's Recommendation
Release Date
2024-01-17
Version
introduced in 1.4, playable from 1.6

Faction

  • Intelligentsia Guild
  • Council of Mundanites
  • University of Veritas Prime
EN Jordan Paul Haro
CN Sang Yuze (桑毓泽)
JP Takeuchi Shunsuke (武内駿輔)
KR Lee Donghoon (이동훈)

Dr. Ratio FAQ

Is Dr. Ratio still worth building?
If you already have him and need a boss killer who works through Follow-up ATKs, yes. He is at his best against bosses in Memory of Chaos and Apocalyptic Shadow, and he struggles in Pure Fiction because he is a single-target character at heart. His damage multipliers are also low compared with version 3 characters.
How many debuffs does Dr. Ratio need on the enemy?
With 3 or more, his Follow-up ATK always triggers after his Skill, and that is the most important threshold. At 5, his Deduction Trace reaches its maximum DMG bonus of 50%.
What should Dr. Ratio use without his signature Light Cone?
Worrisome, Blissful is the closest option. In the Night or Cruising in the Stellar Sea also work, and for a 4-star pick there is See You at the End.
Which Eidolon should I stop at?
E2 is a great value stopping point, giving his Follow-up ATKs extra damage based on the number of debuffs on the enemy. E1 is also very strong, since it gives him CRIT stats right at the start of battle and raises the Summation stack limit.
Does Wiseman's Folly count as a debuff?
No. It only lets Dr. Ratio launch extra Follow-up ATKs when allies attack the target, up to 2 times.