Honkai: Star Rail character guide
Dr. Ratio Best Build
A single-target follow-up attacker whose Chalk attacks become reliable when enemies carry multiple debuffs.
Dr. Ratio build overview
Dr. Ratio is a Imaginary The Hunt character commonly used for main dps, follow-up, single target. The recommended build focuses on the part of the kit used most often while keeping the team rotation reliable.
Use Pioneer Diver of Dead Waters as the primary Relic set and Duran, Dynasty of Running Wolves as the Planar Ornament. Recommended main stats are CRIT Rate / CRIT DMG, SPD / ATK%, Imaginary DMG, ATK%. Secure important Speed, Effect Hit Rate or Break Effect requirements first when the kit needs them, then improve the character's main scaling and offensive or defensive substats.
Light Cones and alternatives
Baptism of Pure Thought is the premium Light Cone because its passive is designed around Dr. Ratio's core mechanics. The build remains functional without it. Cruising in the Stellar Sea and Swordplay provide practical alternatives when their passives stay active in the selected team. Strong Relic stats can be more valuable than forcing a theoretical equipment upgrade with poor synergy.
Recommended teams
- Premium team: Dr Ratio, Topaz Numby, Robin, Aventurine. This formation keeps Dr. Ratio in the core role while covering damage amplification, turn economy and sustain.
- Alternative team: Dr Ratio, Moze, Robin, Aventurine. This formation keeps Dr. Ratio in the core role while covering damage amplification, turn economy and sustain.
- Accessible team: Dr Ratio, Pela, Tingyun, Gallagher. This formation keeps Dr. Ratio in the core role while covering damage amplification, turn economy and sustain.
When replacing a teammate, preserve the same job rather than copying rarity alone: keep the required buffer or debuffer, maintain Skill Point economy and add a sustain suited to the encounter.
Trace priority
- Lower priority: Mind is Might
- High priority: Intellectual Midwifery
- Highest priority: Syllogistic Paradox
- High priority: Cogito, Ergo Sum
- Lower priority: Mold of Idolatry
Raise the ability that defines Dr. Ratio's main role first. Lower-impact abilities can remain below maximum until the character, Light Cone and important teammates have received their guaranteed upgrades.
Investment advice
Start with character and Light Cone levels, major Traces and correct main stats before extended Relic farming. An E0 build with a suitable alternative Light Cone is intended to be complete. Signature equipment and Eidolons are premium upgrades and should be compared with improvements to the rest of the account.
Frequently asked questions
Does Dr. Ratio need the signature Light Cone?
No. Baptism of Pure Thought is the premium recommendation, but the listed alternatives preserve the core playstyle.
What is the most important build rule?
Meet the character's functional stat requirements first, then improve damage or utility without breaking team order and resource management.