If you're already in the late game, chances are Secret Runes are one of the last things you still need. And honestly, that's where the frustration starts. Primordial Rune, Fortune Rune, and Radiant Rune are extremely rare, so farming them efficiently is less about brute force and more about setting up a clean loop: enough luck to improve drops, enough damage to keep one-shotting, and a reset floor that protects your clear speed.

This is the method we'd use if the goal is simple: get more rune rolls per hour without wasting time on slow floors.

• Why This Method Works
• What matters most
• Does Luck Affect Secret Rune Drops?
• Estimated drop scaling
• Best Build for Secret Rune Farming
• Recommended stat focus
• Cooldown Reduction Is a Huge Deal
• Main cooldown reduction sources
• Best Style for Farming Secret Runes
• Quick comparison
• Best Infinity Tower Farming Setup
• The farming loop
• Best reset floor
• Realistic Expectations
• FAQ
• Is luck better than damage for Secret Rune farming?
• What is the best style for Secret Rune farming in Sailor Piece?
• What floor should I reset on in Infinity Tower?
• Does cooldown reduction really matter?
• Final Thoughts

↖ Why This Method Works

From my own testing and from how most endgame players approach tower farming, the biggest mistake is pushing too far just because the drop rate gets better on higher floors.

That sounds good on paper, but in practice it often hurts your farm.

If you stop one-shotting enemies, your run slows down hard. Once that happens, the higher floor is usually less efficient overall, even if the listed rune rate is better.

↖ What matters most

Here's the priority order:

The important part is balance. We're not building pure luck or pure damage. We're building for fast repeated clears.

↖ Does Luck Affect Secret Rune Drops?

From what I've seen, and from what experienced players commonly recommend, luck is worth using for rune farming.

There has always been debate around this, but when drop rates are this low, ignoring luck makes little sense if your build can still clear fast. A strong endgame luck setup can reach around 1478% luck, which players often treat as roughly 14x value in practical farming discussions.

↖ Estimated drop scaling

These are still low numbers, so don't expect miracles. What it does mean is that over long sessions, luck matters.

If you find that adding luck makes you lose your one-shot threshold, lower it slightly.

If you can keep clearing instantly with luck gear on, keep the luck.

That's the sweet spot.

↖ Best Build for Secret Rune Farming

A good farming build should do three things at once:

• Keep enemies dying in one rotation
• Increase rune roll efficiency through luck
• Reduce downtime between waves

↖ Recommended stat focus

From experience, artifacts matter more than many players think. If your tower clear suddenly feels weak, artifacts are one of the first things to check.

↖ Cooldown Reduction Is a Huge Deal

A lot of players focus only on luck and damage, but cooldown reduction is one of the biggest quality-of-life and efficiency stats for tower farming.

If your main AoE move comes back faster, you clear faster. It's that simple.

↖ Main cooldown reduction sources

At around 57% cooldown reduction, farming starts to feel much smoother. Your rotation is tighter, your wave clear is more reliable, and your hourly efficiency goes up.

↖ Best Style for Farming Secret Runes

Right now, the two most relevant farming styles are Ice Queen and Gilgamesh.

↖ Quick comparison

From practical use, Ice Queen feels better for Secret Rune farming because tower enemies are not weak enough to ignore damage scaling anymore. Power creep matters, and Ice Queen's AoE damage gives it the edge.

Gilgamesh is still fine if your account is built around it, but if we're optimizing for speed, Ice Queen is usually the better pick.

↖ Best Infinity Tower Farming Setup

This is where the method becomes efficient instead of random.

↖ The farming loop

1. Enter Infinity Tower

2. Unlock replay early so repeated runs are smoother

3. Reassign your proper stats

4. Turn on auto replay

5. Set auto reset to the highest floor where you still one-shot

6. Use your main AoE farming move on auto

7. Keep an auto clicker running on PC to avoid idle disconnects

↖ Best reset floor

For some strong builds, Floor 60 is a good stopping point. That said, the real rule is:

Reset the moment enemies stop dying instantly.

This is the part that saves the most time over a long grind.

↖ Realistic Expectations

Even with a strong setup, these runes are still rare. That part does not change.

In one long endgame grind, getting both top-tier Secret Runes took around 13 hours of tower farming. That won't be everyone's exact result, but it gives a realistic picture of how rare these drops are.

So if your first few sessions give you nothing, that's normal. The goal of this setup is not to make runes easy. The goal is to make the grind as efficient and repeatable as possible.

↖ FAQ

↖ Is luck better than damage for Secret Rune farming?

Not by itself. The best setup is a balance: enough damage to one-shot, then as much luck as you can add without slowing the run.

↖ What is the best style for Secret Rune farming in Sailor Piece?

For most endgame players, Ice Queen is the best option right now because of its strong AoE and better damage in current tower farming.

↖ What floor should I reset on in Infinity Tower?

Reset on the highest floor where you still clear instantly. For many players that is around Floor 60, but your own build may be lower or higher.

↖ Does cooldown reduction really matter?

Yes. It improves wave clear speed, shortens skill downtime, and makes long tower sessions much smoother.

↖ Final Thoughts

The best Secret Rune farm in Sailor Piece comes down to one idea: protect your clear speed first, then stack luck around it. If you're using a strong farming style, keeping cooldown reduction high, and resetting before your run slows down, you'll give yourself the best possible odds over time.