Best Dr Ratio Build in Honkai: Star Rail

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Explore Dr. Ratio's potent build, top team setups, key traits, abilities, and more in Honkai: Star Rail. This article provides comprehensive insights into Dr. Ratio. Dive into our writing for a complete understanding.

In this article, we will discuss Dr. Ratio’s most powerful build, best team compositions, fundamental characteristics, abilities, and many more details in Honkai: Star Rail. With this article, you will have all the information about Dr. Ratio. Let’s dive into our writing.

Best Dr Ratio Build in Honkai: Star Rail

How to Get Dr. Ratio

There are 2 different ways to obtain Dr. Ratio.

  • Claim Dr. Ratio, the exclusive limited 5-star character, at no cost by redeeming via Mail. This offer is available from January 17, 2024, until the conclusion of Version 2.1.
  • Obtain Dr. Ratio through the Character Warp banner named Panta Rhei, accessible for pulls from January 17, 2024, until February 5, 2024.

Dr. Ratio Rating

Dr. Ratio Base Stats

Dr. Ratio Abilities

Basic Attack

  • Priority: ★
  • Deals 50% of Dr. Ratio’s ATK as Imaginary DMG to a single target enemy.


  • Priority: ★★★★
  • Deals 75% of Dr. Ratio’s ATK as Imaginary DMG to a single target enemy.


  • Priority: ★★★★
  • Deals Imaginary DMG equal to 144% of Dr. Ratio’s ATK to a single target enemy and applies Wiseman’s Folly. When Dr. Ratio’s allies attack a target afflicted with Wiseman’s Folly, Dr. Ratio launches his Talent’s follow-up attack for 1 time 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.


  • Priority: ★★★★★
  • When using his Skill, Dr. Ratio has a 40% fixed chance of launching a follow-up attack against his target for 1 time, dealing Imaginary DMG equal to 135% of Dr. Ratio’s ATK. For each debuff the target enemy has, the fixed chance of launching follow-up attack increases by 20%. If the target enemy is defeated before the follow-up attack triggers, the follow-up attack will be directed at a single random enemy instead.

Dr. Ratio Traces

  • Summation: When Dr. Ratio uses his Skill, for every debuff on the target, his CRIT Rate increases by 2.5% and CRIT DMG by 5%. This effect can stack up to 6 time(s).
  • Inference: When Skill is used to attack an enemy target, there is a 100% base chance to reduce the attacked target’s Effect RES by 10% for 2 turn(s).
  • Deduction: When dealing DMG to a target that has 3 or more debuff(s), for each debuff the target has, the DMG dealt by Dr. Ratio to this target increases by 10%, up to a maximum increase of 50%.

Dr. Ratio Eidolon Levels

Eidolo LevelNameEffect
1Pride Comes Before a FallThe 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.
2The Divine Is in the DetailsWhen his Talent’s follow-up attack hits a target, for every debuff the target has, additionally 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 attack.
3Know ThyselfUltimate Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.
4Ignorance is BlightWhen triggering the Talent, additionally regenerates 15 Energy for Dr. Ratio.
5Sic Itur Ad AstraSkill Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
6Vincit Omnia VeritasAdditionally increases the triggerable count for Wiseman’s Folly by 1. The DMG dealt by the Talent’s follow-up attack increases by 50%.
Dr. Ratio in Honkai: Star Rail

Dr. Ratio’s Best Builds

Imaginary DPS Build

Best Light ConeBaptism of Pure Thought

Increases the wearer’s CRIT DMG by 20%. For every debuff on the enemy target, the wearer’s CRIT DMG dealt against this target increases by 8%, stacking up to 3 times. When using Ultimate to attack the enemy target, the wearer receives the Disputation effect, which increases DMG dealt by 36% and enables their follow-up attacks to ignore 24% of the target’s DEF. This effect lasts for 2 turns.

Best Relic Set – Wastelander of Banditry Desert

2-Piece EffectIncreases Imaginary DMG by 10%.
4-Piece EffectWhen attacking debuffed enemies, the wearer’s CRIT Rate increases by 10%, and their CRIT DMG increases by 20% against Imprisoned enemies.

Best Ornament Set – Inert Salsotto

2-Piece EffectIncreases the wearer’s CRIT Rate by 8%. When the wearer’s current CRIT Rate reaches 50% or higher, the wearer’s Ultimate and follow-up attack DMG increases by 15%.

Best Teams For Dr. Ratio

Dr. Ratio F2P Team

This F2P team follows the conventional Hypercarry configuration, featuring Dr. Ratio as the primary DPS. Yukong enhances Dr. Ratio’s CRIT stats, while Asta boosts his SPD and introduces a chance to inflict Burn on the enemy.

Dr. Ratio Generalist Team

In Dr. Ratio’s optimal teams, a combination of a buffer and debuffer is crucial, with the latter playing a pivotal role in enhancing Dr. Ratio’s Follow-up Attacks.

Topaz exhibits remarkable synergy with Dr. Ratio, offering extra damage and boosting his Follow-up Attack DMG. Meanwhile, Silver Wolf enhances Dr. Ratio’s likelihood of executing Follow-Up attacks by inflicting numerous debuffs on the enemy.

Dr. Ratio Mono-Imaginary Team

This Dr. Ratio team composition proves effective in specific content where the enemy is susceptible to Quantum but not Imaginary damage. Silver Wolf becomes an essential member of this team to impart Imaginary Weakness on the enemy.

Should the enemy already be vulnerable to Imaginary damage, you have the option to substitute Silver Wolf with another capable debuffer.