Sailor Piece Boss Rush Guide

For the Sailor Piece players who are already in the late-game and want some extra damage stats or luck, Boss Rush is a perfect way to get them. This system exists as a test of resilience against the strongest bosses. However, if the players come out on top, the rewards can push damage, critical damage, critical chance, luck, and HP to the next level. So, learn about the Sailor Piece Boss Rush in this guide.

What Is Sailor Piece Boss Rush?

Boss Rush is a 15-wave dungeon run with a 5-minute cooldown in Sailor Piece. In this mode, you fight bosses back-to-back in four different difficulty modes of your choosing. Regular coins and gems in Sailor Piece are awarded for every boss clearance.

If you are with other players, dealing 10% total rush HP damage is a must to earn the final rewards. Moreover, with each extra player, the boss’s HP increases by +55%. You are awarded Rush Coins based on the time taken to clear the waves and their difficulty. Here is how the time tiers work for you to earn the end rewards in Boss Rush:

• SSS: clear in 30s or less
• SS: clear in 60s or less
• S: clear in 120s or less
• A: clear in 180s or less
• B: clear in 240s or less
• C: clear in 300s or less

To start the Boss Rush run, you will need Rush Keys in Sailor Piece. These are legendary items in Sailor Piece that you can earn in multiple ways.

How to Farm Sailor Piece Boss Rush Keys Fast

There are three ways to get Rush Keys: buying them from the Merchant on Sailor Island (175 Gems), getting them from Chests/Quests/ Sailor Piece Codes, or farming NPCs. To farm the keys quickly from NPCs, use AOE damage swords or melee styles in Sailor Piece.

How to Enter Boss Rush in Sailor Piece

Once you have the Rush Keys, teleport to the Sailor Island. From there, look for the Boss Rush NPC on the right side. Interact and click the Spawn button.

Once the dungeon loads, you can select the difficulty. After the 15th wave, the pay and replay option will appear. You can do this to keep playing Boss Rush. Tick the auto-play option to AFK farm the Boss Rush.

Sailor Piece Boss Rush Difficulties and Drop Rates

Now that you know how to play Boss Rush, here is a detailed breakdown of each difficulty level’s boss HP and the Rush Coin (min-max) drop chances:

Difficulty	Boss HP	Rush Coins	Difficulty Modifiers
Normal	W1: 90M W2: 112M W3: 135M W4: 180M W5: 225M W6: 270M W7: 315M W8: 360M W9: 450M W10: 585M W11: 720M W12: 900M W13: 1.08B W14: 1.35B W15: 1.8B	SSS: 2-6 SS: 2-5 S: 2-4 A: 2-4 B: 2-3 C: 1-3	Damage Reduction -35%
Medium	W1: 270M W2: 338M W3: 405M W4: 540M W5: 675M W6: 810M W7: 945M W8: 1.08B W9: 1.35B W10: 1.75B W11: 2.16B W12: 2.7B W13: 3.24B W14: 4.05B W15: 5.4B	SSS: 3-8 SS: 3-7 S: 3-6 A: 2-5 B: 2-4 C: 2-4	Damage Reduction -70% Lifesteal -50%
Hard	W1: 675M W2: 844M W3: 1.01B W4: 1.35B W5: 1.69B W6: 2.02B W7: 2.36B W8: 2.7B W9: 3.38B W10: 4.39B W11: 5.4B W12: 6.75B W13: 8.1B W14: 10.12B W15: 13.5B	SSS: 5-10 SS: 4-8 S: 3-8 A: 3-7 B: 3-6 C: 3-5	Damage Reduction Disabled Lifesteal Disabled iFrames Disabled
Extreme	W1: 1.8B W2: 2.25B W3: 2.7B W4: 3.6B W5: 4.5B W6: 5.4B W7: 6.3B W8: 7.2B W9: 9B W10: 11.7B W11: 14.4B W12: 18B W13: 21.6B W14: 27B W15: 36B	SSS: 8-14 SS: 7-12 S: 6-11 A: 5-9 B: 4-8 C: 4-7	Damage Reduction Disabled Lifesteal Disabled iFrames 2.5s

Along with the Rush Coins, you can also get the Sin of Pride sword, inspired by Escanor in Sailor Piece, from the Boss Rush. Now comes the key question…

What to Buy with Rush Coins in Sailor Piece?

The Rush Coins are used for two key things: Rush Store purchases or Boss Rush upgrades in Sailor Piece. Here is the full breakdown:

Boss Rush Store

The Boss Rush shop is not the best place to spend your coins. However, if you have already upgraded your Boss Rush stats, then you can go for the Aura Crate to get Auras in Sailor Piece.

Item	Rush Coin
Sun Armor	250
Trait Reroll	2
Clan Reroll	5
Race Reroll	2
Boss Key	1
Dungeon Key	2
Common Chest	1
Rare Chest	3
Epic Chest	6
Legendary Chest	15
Mythical Chest	40
Secret Chest	400
Aura Crate	1.2K

Boss Upgrades

To complete the full Boss Rush upgrades, you will need a total of 6,625 Rush Coins in Sailor Piece. Here is the full upgrade breakdown:

Stat	L1	L2	L3	L4	L5	Total Cost	Max Stat Value
Damage	100	150	250	350	500	1350	25 (+5%/level)
Critical Damage	100	150	250	350	500	1350	15 (+3%/level)
Critical Chance	100	150	250	350	500	1350	5 (+1%/level)
HP	75	100	150	200	300	850	37.5 (+7.5%/level)
Luck	125	200	300	450	650	1725	15 (+3%/level)

Tips and Tricks to AFK Farm Boss Rush Quickly

To maximize your Rush Coin farming efficiency, team up with two similarly geared players to AFK farm Normal mode. This difficulty hits the sweet spot for rapid clears while offering payouts nearly identical to Medium.

With that said, here are some quick tips that you can use to farm Boss Rush coins fast in Sailor Piece:

• Optimal AFK Melee Builds: Equip King of Heroes (spam V) for the best results, and avoid using swords entirely since they lack reliable AFK potential. If you still want to go for higher difficulty, Ice Queen (spam V) is a solid choice.
• Avoid Extreme Mode: Going for the highest difficulty is not worth the time investment to grind. The difficulty slows down your runs, even if you are using the absolute best damage builds.
• Use Primordial Rune: We suggest you farm the Infinite Tower to get the Primordial Rune. This rune in Sailor Piece increases damage significantly.

How Long Does It Takes to Max Boss Rush Upgrades in Sailor Piece

As we said before, fully maxing out all Boss Rush upgrades requires a total of 6,625 Rush Coins. By utilizing the current optimal AFK strategy on Medium mode, you can consistently achieve S or SS completion ranks in under a minute, yielding an average of 5 coins per run.

At a steady pace of 60 or more clears per hour, you will need approximately 1,315 to 1,325 total runs to reach your target. Ultimately, this translates to an estimated continuous grinding time of roughly 21 to 22 hours to afford every upgrade.

So, did you complete your Sailor Piece Boss Rush upgrades yet? If you are done with it, make sure you use the stat rerolls in Sailor Piece to upgrade your stats further.