Rin Tohsaka is a 5-star Quantum character on the Path of Erudition, and her damage lives almost entirely in her Enhanced Skill, Second Magic Experiment. That bounce engine scales with ATK and CRIT, so the right Light Cone matters more than usual. The best options push CRIT Rate, Skill damage, and DEF ignore while she cycles Skill Points with Archer.
Quick answer: Equip Flickering Stars, her signature 5-star Light Cone. If you don’t have it, use Into the Unreachable Veil (The Herta’s signature) as the closest 5-star substitute, or grab Eternal Calculus free from The Herta Store.
Light Cone ranking for Rin Tohsaka
The order below reflects relative damage output, accounting for both each Light Cone’s effect and its base stats. Percentages are the approximate DPS increase Rin gets from each option at the listed refinement.
| Light Cone | Rarity | Approx. DPS | Source |
|---|---|---|---|
| Flickering Stars (S1) | 5★ | 114% | Signature warp |
| Into the Unreachable Veil (S1) | 5★ | 102% | Event Warp (limited) |
| Today Is Another Peaceful Day (S5) | 4★ | 100% | Nameless Glory |
| Eternal Calculus (S5) | 5★ | 98% | The Herta Store |
| The Day The Cosmos Fell (S5) | 5★ | 96% | Forgotten Hall Store |
| Make the World Clamor (S5) | 4★ | 96% | Stellar Warp |
Flickering Stars: her signature and best-in-slot
Flickering Stars is built for Rin’s exact loop. It gives a flat CRIT Rate boost, then rewards heavy Skill Point spending, which is precisely what an Archer team does every turn.
- Increases the wearer’s CRIT Rate by 18% at S1 (up to 30% at S5).
- When any ally consumes 4 or more Skill Points in a single turn, the wearer gains “Radiant Crown” for 3 turns.
- While Radiant Crown is active, all allies’ damage ignores 20% of the target’s DEF, and the wearer’s Skill DMG increases by 72% (up to 36% DEF ignore and 120% Skill DMG at S5).
The reason it tops the list is that it stacks a personal Skill damage buff with a team-wide DEF shred, which multiplies directly into her multi-hit Enhanced Skill. Paired with Archer and a Skill Point generator like Sparkle, Radiant Crown stays up nearly all the time.
Into the Unreachable Veil: the strongest 5-star alternative
If you pulled The Herta’s signature Light Cone, it slots onto Rin cleanly. It trails Flickering Stars but stays close, mostly because it leans into her personal damage rather than team support.
- Increases the wearer’s CRIT Rate by 12% at S1 (up to 20% at S5).
- Using the Ultimate raises the wearer’s Skill DMG and Ultimate DMG by 60% for 3 turns (up to 100% at S5).
- After the Ultimate, if it consumed 140 or more Energy, it recovers 1 Skill Point.
Because Rin’s Ultimate costs 160 Energy, the Skill Point refund reliably triggers, feeding straight back into her Gem Energy generation. The 60% Skill and Ultimate boost lands during her burst window, right when she fires the Enhanced Skill.
Free and low-cost Light Cones
Rin performs well without a limited 5-star, which helps if you’re spending your pulls on Archer instead. These options are farmable or come from event and shop rewards.
Eternal Calculus (The Herta Store)
This is the strongest free 5-star for Rin. It increases ATK by 8%, then adds 4% ATK per enemy hit, stacking up to 5 times. When 3 or more enemies are hit, the wearer’s SPD rises by 8% for one turn. Rin can satisfy the multi-target condition through her Joint Follow-Up ATK with Archer even without using her Enhanced Skill, and the effects roughly double at S5.
Today Is Another Peaceful Day (Nameless Glory)
A reliable 4-star pick that scales with Max Energy. Each point of Energy adds 0.2% DMG (up to 0.4% at S5), counting a maximum of 160 Energy. Since Rin runs a 160-Energy Ultimate, she pulls the full value from this passive, and at S5 it edges past several higher-rarity options.
Other close options
| Light Cone | What it does |
|---|---|
| The Day The Cosmos Fell (S5) | ATK +16%. When attacking with at least 2 enemies that have the matching Weakness, CRIT DMG +20% for 2 turns. |
| Make the World Clamor (S5) | Regenerates 20 Energy on entering battle and increases Ultimate DMG by 32%, for a faster first Ult. |
How to choose the right one
The decision comes down to what you already own and how much you invest in Rin. Flickering Stars wins in every team because it buffs both her and the whole party. Below that, pick based on availability.
- Have her signature: Flickering Stars, no contest.
- Own The Herta’s cone: Into the Unreachable Veil for the Skill Point refund and burst boost.
- Fully free-to-play: Eternal Calculus from The Herta Store, or a maxed Today Is Another Peaceful Day.
Whichever you equip, prioritize CRIT Rate on the Body piece, ATK% or Quantum DMG elsewhere, and enough SPD to move faster than your Skill Point supplier so Rin can bank Gem Energy before her turn. That combination lets her Enhanced Skill hit its highest bounce counts, which is where the vast majority of her damage comes from.
