Best Dr. Ratio Honkai Star Rail build: Relics, Light Cones, Eidolons, and Traces

❘ Updated: 2024-01-17T12:30:00

A screenshot from the game Honkai Star Rail

HoYoverse

Dr. Ratio is a 5-star Imaginary Hunt unit in Honkai Star Rail. Here is everything you need to know, including his Traces, Light Cones, Eidolons, and team comp.

Dr. Ratio is a very unique Hunt character since his kit revolves around follow-up attacks instead of one-hit damage. He was awarded to every player for free, but he is quite possibly one of the best DPS units in the game.

Hence, Dr. Ratio is worth building if you are a free-to-play user or brand new to the game. In fact, if you are a veteran, Dr. Ratio is equally good, and you might even look to pull for his Eidolons.

Regardless, if you plan to build him, we have you covered. Here is all you need regarding Dr. Ratio, including his Light Cones, best Traces to level-up, possible team comp, Relics, and ornament sets.

Contents

Dr. Ratio abilites in Honkai Star Rail
Dr. Ratio Eidolons in Honkai Star Rail
Best Dr. Ratio Light Cone in Honkai Star Rail
Best Dr. Ratio Relic and Ornament in Honkai Star Rail
Trace and stat level-up requirements for Dr.Ratio in Honkai Star Rail
Best Dr. Ratio team comp in Honkai Star Rail
Dr. Ratio trailer in Honkai Star Rail

Dr. Ratio abilities in Honkai Star Rail

Dr. Ratio has really powerful traces in the game

Basic Attack – Mind is Might: Deals Imaginary DMG equal to 50% of Dr. Ratio’s ATK to a single target enemy.
Skill – Intellectual Midwifery: Deals Imaginary DMG equal to 75% of Dr. Ratio’s ATK to a single target enemy.
Ultimate – Syllogistic Paradox: 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.
Talent – Cogito, Ergo Sum: 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.
Technique – Mold of Idolatry: 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 created by allies can exist at the same time.

Bonus Ability

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%.
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).

Dr. Ratio Eidolons in Honkai Star Rail

Dr. Ratio Eidolons are worth investing in the game

Level One – Pride Comes Before a Fall: 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.
Level Two – The Divine is in the Details: When 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.
Level Three – Know Thyself: Ultimate Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.
Level Four – Ignorance is Blight: When triggering the Talent, additionally regenerates 15 Energy for Dr. Ratio.
Level Five – Sic Itur Ad Astra: Skill Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
Level Six – Vincit Omnia Veritas: Increases the trigger count for Wiseman’s Folly by 1. The DMG dealt by the Talent’s follow-up attack increases by 50%.

Best Dr. Ratio Light Cone in Honkai Star Rail

Dr. Ratio best Light Cone is worth investing in the game

The best Light Cone for Dr. Ratio in Honkai Star Rail is Baptism of Pure Thought. This Light Cone increases the wearer’s CRIT DMG by 20%-32%. Additionally, for every debuff on the enemy, the wearer’s CRIT DMG dealt against this target increases by 8%-12%.

Apart from that, when using the Ultimate ability to attack an enemy target, the wearer will receive a Disputation effect, increasing DMG dealt by 36%-60% and enabling follow-up attacks to ignore 24%-40% of the target’s DEF. You can obtain this Light Cone from the Light Cone event warp.

If you do not have this Light Cone, you can go for something like Worrisome, Blissful, or In the Night. Both of these Light Cones can also be obtained from the event warp. If you are looking for something more accessible, you can choose Sleep Like the Dead or Cruising in the Stellar Sea.

In terms of 4-star options, we recommend Swordplay and Only Silence Remains.

Best Dr. Ratio Relics and Ornament set

The best Relic set for Dr. Ratio is Pioneer Diver of Dead Waters. The set bonus for this Relic set has been listed below:

2-pc bonus: Increases DMG dealt to enemies with debuff by 12%.
4-pc bonus: Increases CRIT Rate by 4%. The wearer deals 8%/12% increased CRIT DMG to enemies with at least 2/3 debuffs. After the wearer inflicts a debuff on enemy targets, the aforementioned effects increase by 100%, lasting for 1 turn(s).

The best Ornament set for Dr. Ratio in Honkai Star Rail is Inert Salsotto. This Ornament set will increase the wearer’s CRIT Rate by 8%. Additionally, when the wearer’s CRIT Rate increases by 50% or higher, Ultimate and follow-up attack damage increases by 15%.

Trace level-up and stat requirement for Dr. Ratio in Honkai Star Rail

The traces you need to focus on for Dr. Ratio in Honkai Star Rail in order of priority are:

Talent
Skill
Ultimate

The stat requirement for Dr. Ratio in Honkai Star Rail has been discussed below:

Main Stat	Sub-Stat
Body: Crit Rate/CRIT DMG	CRIT DMG
Feet: SPD or ATK%	Crit Rate
Sphere: Imaginary DMG	ATK%
Rope: ATK%	SPD

Best Dr. Ratio team comp in Honkai Star Rail

Dr. Ratio works quite well with Topaz and Silver Wolf

Dr. Ratio is a character that relies on follow-up attacks. Therefore, the best characters you can pair alongside Dr. Ratio are Topaz, Silver Wolf, and Huohuo. This comp will allow Topaz to increase Dr. Ratio’s follow-up attack damage and Silver Wolf to debuff enemies, making his follow-up attacks occur more frequently.

Additionally, you can form a team with Dr. Ratio, Silver Wolf, Luocha, and Yukong. Silver Wolf is necessary for this setup to implant an Imaginary weakness onto enemies.

If you are looking for a free-to-play team, you can go for something like Dr. Ratio, Yukong, Natasha, and Asta.

Dr. Ratio trailer in Honkai Star Rail

On January 12, 2024, HoYoverse released the official trailer for Dr. Ratio in Honkai Star Rail. If you have not checked it out yet, you can do so from the link provided below:

This is everything we know about Dr. Ratio so far in Honkai Star Rail. In the meantime, do not forget to look into some of our other Honkai Star Rail guides at Dexerto.