For Sailor Piece players in the late game who want extra damage statistics or luck, Boss Rush is a perfect way to obtain these. This system continues to exist as a test of endurance against the strongest bosses. However, if players reach the top, the rewards can enhance damage, critical damage, critical chance, luck, and HP to a higher level. Learn about 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 timer in Sailor Piece. In this mode, you will fight bosses consecutively in four different difficulty modes of your choice. Regular coins and gems are awarded for each boss cleared in Sailor Piece.

If you are with other players, it is necessary to contribute 10% of the total Boss Rush HP damage to earn the final rewards. Additionally, the boss's HP increases by 55% for each additional player. You are rewarded with Rush Coins based on the time taken to clear the waves and the difficulty level. Here’s how the time tiers work for earning the final rewards in Boss Rush:

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

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

How to Quickly Obtain Rush Keys in Sailor Piece?

There are three ways to obtain Rush Keys:

  • Purchase from the Merchant on Sailor Island (175 Gems)
  • Obtain from chests/quests/Sailor Piece codes
  • Scan NPCs. Use AOE damage swords or melee styles in Sailor Piece to quickly obtain keys from NPCs

How to Start Boss Rush in Sailor Piece?

After obtaining Rush Keys, teleport to 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 wave 15, a payment and replay option will appear. You can do this to continue playing Boss Rush. Check the automatic play option to AFK farm Boss Rush.

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 Rush Coin (min-max) drop rates:

DifficultyBoss HPRush CoinDifficulty Modifiers
NormalW1: 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%
MediumW1: 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%
Life Steal -50%
HardW1: 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
Life Steal Disabled
iFrames Disabled
ExtremeW1: 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
Life Steal Disabled
iFrames 2.5s

In addition to Rush Coins, you can also obtain the Pride Sword made inspired by Escanor from Sailor Piece from Boss Rush. Now, let’s get to the main question…

What Can You Get with Rush Coins in Sailor Piece?

Rush Coins are used for two important things in Sailor Piece: Rush Shop purchases or Boss Rush upgrades. Here’s the complete breakdown:

Boss Rush Shop

The Boss Rush shop is not the best place to spend your coins. However, if you have already upgraded your Boss Rush statistics, you may prefer the Aura Box to obtain Auras in Sailor Piece.

ItemRush Coin
Sun Armor250
Feature Refresh2
Clan Refresh5
Race Refresh2
Boss Key1
Dungeon Key2
Common Chest1
Rare Chest3
Epic Chest6
Legendary Chest15
Mythical Chest40
Secret Chest400
Aura Box1.2K

Boss Upgrades

To complete all Boss Rush upgrades, a total of 6,625 Rush Coins is required. Here’s the full upgrade breakdown:

StatisticL1L2L3L4L5Total CostMax Statistic Value
Damage100150250350500135025 (+5%/level)
Critical Damage100150250350500135015 (+3%/level)
Critical Chance10015025035050013505 (+1%/level)
HP7510015020030085037.5 (+7.5%/level)
Luck125200300450650172515 (+3%/level)

AFK Farming Tips and Tricks for Boss Rush

To increase your Rush Coin farming efficiency, team up with two players with similar gear to AFK farm in Normal mode. This difficulty hits the sweet spot for fast clears while offering nearly the same payouts as Medium.

That said, here are some quick tips you can use to quickly farm Boss Rush coins in Sailor Piece:

  • Optimal AFK Melee Configurations: Equip the King of Heroes (spam V) for the best results and avoid using swords due to the lack of reliable AFK potential. If you still want to go for a higher difficulty, the Ice Queen (spam V) is a solid choice.
  • Avoid Extreme Mode: Going to the highest difficulty is not worth the time investment. The difficulty slows down your runs even if you use the best damage configurations.
  • Use the Ancient Age Rune: We recommend farming the Infinite Tower to obtain the Ancient Age Rune. This rune significantly increases damage in Sailor Piece.

How Long Does It Take to Complete Boss Rush Upgrades?

As mentioned earlier, completing all Boss Rush upgrades requires a total of 6,625 Rush Coins. By using the current optimal AFK strategy in Medium mode, you can consistently achieve S or SS completion ranks in under a minute and earn an average of 5 coins per run.

At a cleaning pace of 60 or more per hour, you will need approximately 1,315 to 1,325 total runs to reach your goal. As a result, this translates to about 21 to 22 hours of continuous farming time to meet each upgrade.

So, have you completed your Sailor Piece Boss Rush upgrades? If you have, don’t forget to use statistic re-cycles to further enhance your statistics in Sailor Piece.

How can I obtain Rush Keys in Sailor Piece?

Purchase Rush Keys from the Sailor Island Merchant for 175 Gems or find them in chests, quests, and codes. Alternatively, quickly farm by defeating NPCs with large AOE attacks.

What is the best configuration to AFK farm Boss Rush?

Equip the King of Heroes melee style for the easiest AFK wave clears and spam the 'V' ability.

How can I earn Rush Coins in Sailor Piece?

You need to successfully complete the Boss Rush dungeon to earn Rush Coins in Sailor Piece. You will be rewarded with Rush Coins at the end of a successful 15 wave run.