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For seasoned players of Sailor Piece, particularly those deep into the late-game phase, participating in the Boss Rush mode offers an excellent opportunity to boost their damage statistics and luck. This unique gameplay feature puts players against a series of formidable bosses, testing their resilience and skill. Victorious players will reap significant rewards, enhancing various attributes such as damage, critical damage, critical chance, luck, and HP.
Understanding Sailor Piece Boss Rush
Boss Rush is structured as a 15-wave dungeon run featuring a strict 5-minute countdown. Players engage in consecutive battles against bosses of their choosing across four different difficulty levels. Successfully defeating each boss yields regular coins and gems.
When participating with teammates, it is crucial that every player collectively inflicts 10% of the total rush HP damage to qualify for the ultimate rewards. It’s worth noting that the boss’s HP increases by 55% for each additional player joining the fight. Rewards, referred to as Rush Coins, are dependent on the clear time and chosen difficulty. The following time tiers dictate the rewards obtained:
- 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 initiate a Boss Rush, players must acquire Rush Keys, which are highly sought-after items attainable through various means.
Efficient Farming of Boss Rush Keys
Players can acquire Rush Keys through three primary methods:
- Purchase from the Merchant on Sailor Island for 175 Gems
- Obtain them via Chests, Quests, or Sailor Piece Codes
- Farming NPCs. To quickly gather keys, use area-of-effect (AOE) damage swords or melee styles in Sailor Piece.

How to Launch Boss Rush in Sailor Piece
After securing the Rush Keys, teleport to Sailor Island and locate the Boss Rush NPC positioned on the right. Interact with the NPC and select the Spawn button to commence the dungeon run.


Upon the dungeon loading, players can select their desired difficulty. After navigating through the 15 waves, an option to pay and replay will emerge, allowing continuous engagement in Boss Rush. Activating the auto-play setting enables players to AFK farm efficiently.
Boss Rush Difficulties and Rush Coin Drop Rates
Now that you’re familiar with engaging in Boss Rush, let’s delve into the details concerning the different difficulty levels, including the boss HP and the Rush Coin drop rates:
| Difficulty | Boss HP | Rush Coins | Difficulty Modifiers |
|---|---|---|---|
| Normal | W1: 90M – 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 – 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 – 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 – 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 |
In addition to earning Rush Coins, players can also acquire the Sin of Pride sword, inspired by the character Escanor, through participation in Boss Rush. This leads us to the next important query…
Utilizing Rush Coins in Sailor Piece
Rush Coins serve two main purposes in Sailor Piece: making purchases from the Rush Store or upgrading Boss Rush capabilities. Here’s a closer look:
Boss Rush Store
While the Boss Rush Store may not always be the top choice for expenditure, those who have already enhanced their Boss Rush stats might consider buying the Aura Crate for potential Auras in Sailor Piece.
| Item | Rush Coin Cost |
|---|---|
| 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
Achieving the complete set of Boss Rush upgrades necessitates a grand total of 6, 625 Rush Coins in Sailor Piece. Below is the detailed breakdown of the upgrade costs:
| 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) |
Effective Tips for AFK Farming Boss Rush
To optimize Rush Coin farming, collaborating with two players who share similar gear to AFK farm Normal mode is highly recommended. This level is ideal for rapid clears while providing rewards that are closely aligned with those from the Medium difficulty.
Here are some quick strategies to maximize Boss Rush coin farming:
- Optimal AFK Melee Builds: Equip the King of Heroes and utilize the ‘V’ ability for enhanced results while forgoing swords as they lack reliable AFK output. For those attempting higher difficulties, the Ice Queen build is a solid alternative.
- Avoid Extreme Mode: Striving for the highest difficulty may not yield proportional benefits, as it could significantly decelerate your runs, even with top-tier damage builds.
- Use the Primordial Rune: Farm the Infinite Tower to acquire the Primordial Rune, a valuable asset that dramatically increases damage in Sailor Piece.
Timeline to Maximize Boss Rush Upgrades in Sailor Piece
As mentioned earlier, fully upgrading all Boss Rush attributes requires 6, 625 Rush Coins. By implementing the current best AFK strategy on Medium mode, players can achieve S or SS ranks in under one minute, ideally earning around 5 coins per run.
At an estimated pace of 60 or more clears each hour, players will need to complete between 1, 315 and 1, 325 runs to gather the necessary coins. This ultimately translates to an approximate grinding duration of 21 to 22 hours to achieve complete upgrades.
So, have you completed your Sailor Piece Boss Rush upgrades yet? If so, remember to utilize the stat rerolls available in Sailor Piece to further enhance your character’s performance.
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