I still remember the uproar when HoYoverse handed out a free Dr. Ratio to every player until the end of Version 2.1. A 5-star Imaginary Hunt character for nothing – it felt like a gift and a gamble all at once. Fast forward to 2026, and that gamble has paid off handsomely. Even with two years of new units, Dr. Ratio remains one of the most reliable single-target nukers in Honkai: Star Rail. But is he still worth building from scratch? Can he keep up with newer DPS like Screwllum or the ever-expanding roster of Destruction titans? The short answer: absolutely. Let me walk you through the optimal Dr. Ratio setup in 2026, because the fundamentals of his kit have aged like fine wine.

Best Light Cones For Dr. Ratio

When we talk about Dr. Ratio’s personal weapon, Baptism of Pure Thought is still the gold standard. Its 80-level base ATK of 582 is solid, but the real magic is in its superimposition ability: a flat 20% CRIT DMG boost, plus up to 24% extra CRIT DMG per debuff on the target (three stacks). Then there’s the Disputation effect – after using his Ultimate, Dr. Ratio gains a 26% damage increase and his follow-up attacks ignore 24% of the target’s DEF for two turns. It’s as if the Light Cone was carved from his mathematical formulas. If you managed to snag it during a rerun, you’re golden.

But let’s be honest: not everyone has the luxury of signature weapons. One of the most powerful substitutes is Worrisome, Blissful (Topaz’s Light Cone). It grants 18% CRIT Rate, 30% follow-up attack DMG, and applies the Tame debuff that scales your allies’ CRIT DMG against the target. Dr. Ratio may not be a follow-up support like Topaz, but he triggers so many follow-up strikes that Tame stacks quickly, making this a pseudo-signature for him.

If you’re on a F2P journey, Cruising in the Stellar Sea remains a trusty 5-star option from Herta’s Shop. It offers CRIT Rate and situational ATK boosts that synergize with his ST-focused playstyle. Among 4-stars, Swordplay and Return to Darkness shine because they pile on CRIT Rate and CRIT DMG – exactly what a Hunt character covets. In 2026, the lesson hasn’t changed: prioritize CRIT stats and follow-up attack bonuses above all else.

Best Relics, Ornaments, & Stats For Dr. Ratio

For relics, I still run Wastelander of Banditry Desert as my 4-piece set. The 10% Imaginary DMG from the 2-piece is a no-brainer, but the 4-piece truly elevates his damage ceiling: +10% CRIT Rate against debuffed enemies and +20% CRIT DMG versus Imprisoned foes. If you can weave Imprisonment into your team rotation (more on that later), this set easily outperforms newer alternatives like the Pioneer Diver of Dead Waters.

As for planar ornaments, Inert Salsotto has been my go-to since Version 1.0, and it hasn’t dethroned yet. The 8% CRIT Rate is welcome, and once you hit that magic 50% CRIT Rate threshold, your Ultimate and follow-up attacks deal 15% more damage. Since Dr. Ratio lives and dies by his follow-up RNG and burst, this set addresses his core needs without any convoluted conditions.

Now, the stat hunt. In 2026, with all the power creep, I still advocate for the classic 1:2 CRIT ratio – aim for at least 70% CRIT Rate and 140% CRIT DMG, though you can push past 80/160 with serious farming. ATK%, Imaginary DMG Bonus, and SPD are your secondary priorities. Break Effect and HP are nice-to-have sprinklings, but never chase them at the cost of CRIT. Remember: his Talent procs are the real star, and they need to crit.

Best Team Comps For Dr. Ratio

Dr. Ratio’s kit is a simple equation: the more debuffs, the higher his follow-up chance. That’s why the debuffer slot is non-negotiable. Silver Wolf still reigns supreme – she implants weaknesses, and in 2026’s meta where mono- or duo-element teams are flexible, that’s priceless. She also adds three debuffs with her basic kit, feeding his pasive. Alternatives like Pela (AoE DEF shred), Welt (Imprisonment and Slow), or Guinaifen (Burn and Vulnerability) can slot in depending on your roster. I’ve seen some creative players use a high-Eidolon Kafka just for the DoT-based debuffs, but that’s overkill unless you’re flexing.

Next, the buffer. Ruan Mei remains the queen of versatility – her teamwide SPD and DMG boosts are nuts, and her ultimate can hold enemies in a broken state longer, indirectly triggering Imprisonment from Imaginary break. If you don’t have her, Tingyun is a budget goddess who fuels Dr. Ratio’s energy-hungry Ultimate while boosting ATK. Yukong, despite her clunky timing, can provide monster CRIT buffs if speed-tuned correctly.

For sustain, Luocha and Huohuo are still the top picks. Luocha offers brain-dead auto-healing and a dispell, while Huohuo cleanses and provides energy + ATK buffs. With the resurgence of Harmony Trailblazer and the advent of new abundance units in 2026, you could even experiment with double-sustain if you’re tackling hard Simulated Universe runs, but that’s usually overkill in Memory of Chaos.

A sample team I’ve been rocking this year: Dr. Ratio, Silver Wolf, Ruan Mei, Huohuo . It blitzes any single-target boss within a few cycles. But don’t be afraid to innovate – that’s what keeps this game fun after three years.

Skill Priority For Dr. Ratio

When you’re staring at that Trace tree, here’s my advice: max his Talent first. That’s where his follow-up attack damage and trigger logic live. Yes, his Ultimate and Skill hit hard, but the follow-ups are the core loop – and you want them to obliterate. After that, level his Ultimate and Skill roughly in tandem, because both feed into his damage rotation. His Basic Attack should only see the light when Skill Points are dry, so leave it for last.

One detail often overlooked: don’t ignore his A6 Major Trace, “Cogito, Ergo Sum,” which boosts his follow-up DMG further when enemies have three debuffs. Pair that with the “Summation” effect from his Talent, and you’ll understand why debuff stacking is everything.

In the end, constructing Dr. Ratio in 2026 is almost therapeutic. No HP-loss gimmicks, no break-effect dependency – just pure, unadulterated math. And while the gacha world spins ever faster, this chalk-wielding scholar remains a benchmark for single-target damage. So if you’re still sitting on that free copy from 2024, take this as your sign to invest. He hasn’t missed a beat, and neither should you.