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. Dr. Ratio's build supports the listed role 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%. Dr. Ratio should meet the listed Speed, Effect Hit Rate or Break Effect target first. Then improve the main scaling stats.
Light Cones and alternatives
Baptism of Pure Thought is the premium Light Cone because its passive is designed around Dr. Ratio's core mechanics. Dr. Ratio can use the listed Light Cones when their passives match the team rotation. Cruising in the Stellar Sea and Swordplay For Dr. Ratio, keep the Relic setup with stronger main stats and useful substats.
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.
Dr. Ratio's team swaps should keep a buffer or debuffer plus a sustain for clean single-target windows.
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. Dr. Ratio's lower-impact Traces can wait until the character, Light Cone and main teammates are leveled.
Investment advice
Level Dr. Ratio, the Light Cone and key Traces before long Relic farming sessions. Dr. Ratio is complete at E0 with a suitable alternative Light Cone. Compare Dr. Ratio's signature or Eidolons with upgrades for the full team.
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 Dr. Ratio's listed stat targets first, then add damage or utility without changing the planned turn order.