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Wiki Entry

Boss Rush

Sailor Island boss gauntlet with 15 waves, Rush Keys, Rush Coins, Sin of Pride drops, and permanent Rush upgrades.

Systems Verified

Island Sailor Island

Waves 15

Global timer 300 seconds

Difficulties Easy, Medium, Hard, Extreme

Entry item Rush Key

Reward gate Deal 10% of total rush HP

Upgrade total 6,625 Boss Rush Coins

Max upgrade stats +25% Damage, +15% Critical Damage, +5% Critical Chance, +37.5% HP, +15% Luck

Page Filter

Useful for big overview pages when you want one item fast.

Calculator

Plan the grind before you farm

Open Grinding Time Calculator Estimate Rush Coin grind time from your average Boss Rush clear speed and coins per clear.

Rush Coins Use your clear time and payout to estimate how long permanent upgrades will take.

Shared progress Pull saved Boss Rush upgrade progress, then adjust the remaining coins here if needed.

Overview

Boss Rush

Boss Rush is a system guide in Sailor Piece.

Section

How to start Boss Rush

Travel to Sailor Island.
Go through the main gates and head to the right side of the island.
Find the three Boss Rush NPCs and use the central NPC to open the portal.
Spend 1 Rush Key and choose your difficulty before entering the 15-wave run.

Section

Rush Key sources

Source	Details
NPC drops	Current wiki chart ranges from Thief 0.0385% up to Ghoul Members 0.26% on the strongest normal-enemy line
Best enemy lines	Ghoul Members 0.26%, Strong Slayer 0.245%, Spirit Fighter 0.23%, Fast Ninja 0.21%, and Strong Bandit 0.195%
Merchant route	Tracked 175 Gem merchant purchase route
Rush Shop buyback	Rush Keys can be bought back for 1 Rush Coin each after you start farming the mode
Fast farm note	Shinjuku Island and later enemy lines are the cleanest key farms once you can clear them quickly

Section

Boss Rush shop and upgrades

Type	Details
Permanent upgrades	Boss Rush Upgrades were added during the Escanor update. Spend Rush Coins at Sailor Island on Damage, Critical Damage, Critical Chance, HP, and Luck.
Listed shop buyout	Buying one of each listed non-upgrade shop item costs 1,927 Rush Coins total
Sun Armor	250 Rush Coins
Aura Crate	1,200 Rush Coins
Secret Chest	400 Rush Coins
Mythic Chest	40 Rush Coins
Legendary Chest	15 Rush Coins
Epic Chest	6 Rush Coins
Clan Reroll	5 Rush Coins
Rare Chest	3 Rush Coins
Trait Reroll	2 Rush Coins
Race Reroll	2 Rush Coins
Dungeon Key	2 Rush Coins
Common Chest	1 Rush Coin
Boss Key	1 Rush Coin

Section

Boss Rush upgrade costs

Upgrade	Level 1	Level 2	Level 3	Level 4	Level 5	Total cost
Damage	100	150	250	350	500	1,350
Critical Damage	100	150	250	350	500	1,350
Critical Chance	100	150	250	350	500	1,350
HP	75	100	150	200	325	850
Luck	125	200	300	450	650	1,725
Full total	-	-	-	-	-	6,625 Boss Rush Coins

Section

Total stats (max level)

Stat	Max bonus	Per level
Damage	+25%	+5% per level
Critical Damage	+15%	+3% per level
Critical Chance	+5%	+1% per level
HP	+37.5%	+7.5% per level
Luck	+15%	+3% per level

Section

Boss Rush clear rewards

Difficulty	Sin of Pride drop rate	Rush Coin payout range
Easy	0.6%	C to SSS clears pay 1 to 6 Rush Coins
Medium	0.85%	C to SSS clears pay 2 to 8 Rush Coins
Hard	1.25%	C to SSS clears pay 3 to 10 Rush Coins
Extreme	1.85%	C to SSS clears pay 4 to 14 Rush Coins

Section

Clear grades and timer thresholds

Grade	Clear time
SSS	30 seconds or less
SS	60 seconds or less
S	120 seconds or less
A	180 seconds or less
B	240 seconds or less
C	300 seconds or less

Section

Rush Coin payouts by clear grade

Difficulty	SSS	SS	S	A	B	C
Easy	2 to 6	2 to 5	2 to 4	2 to 4	2 to 3	1 to 3
Medium	3 to 8	3 to 7	3 to 6	2 to 5	2 to 4	2 to 4
Hard	6 to 10	5 to 10	5 to 9	3 to 7	3 to 6	3 to 5
Extreme	8 to 14	7 to 12	6 to 11	5 to 9	4 to 8	4 to 7

Section

Current payout certainty

Easy, Medium, and Extreme still follow the older published payout chart cleanly enough for the current wiki version.
Hard S is the only top Hard-grade payout treated as directly settled on this page right now: repeated live clears put it at 5 to 9 Rush Coins .
Hard SS and Hard SSS are currently left as provisional inferred rows at 5 to 10 and 6 to 10 so they stay above the confirmed S line without pretending the full Hard ladder is fully proven yet.

Section

Boss Rush HP by wave

Easy: 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.
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.
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.
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.
HP scales up by about 55% per player when another person is inside the dungeon, so duos and trios should expect a much fatter health pool.

Section

Exclusive Boss Rush drops

Drop	Published rate	Notes
Sin of Pride	0.6% to 1.85%	Main special weapon from the Escanor boss
The One title	0.85% to 1.75%	The One title is currently tracked at +65% Damage
Sun Armor	0.5% to 1.5%	Shop purchase or direct Boss Rush drop depending on your luck

Section

Team play notes

Running with up to three players is still the safest clear-speed setup when the team can keep wave timers low.
You still need to personally contribute at least 10% of the total rush HP or the run will not pay out end rewards.
Extreme difficulty scales boss HP very hard and is much smoother with coordinated burst builds.
Escanor can appear up to three times in one run, but his spawn is not guaranteed.
Madoka and Dragon Slayer/Ragna are random Boss Rush or Infinite Tower boss spawns. Abyssal Empress and Abyssal Outfit are tracked as Infinite Tower boss reward lines that can roll from any boss that spawns there, with chance based on floor.

Tracker

Boss Rush progress tracker

Track your current Rush Coin stash, the cheapest next permanent upgrade, and the total coins still left until Boss Rush is fully maxed.

Infinite Tower Tower Island endgame mode with scaling floors, stacking debuffs, direct floor rewards, Tower Tokens, and a backup shop. Dungeons Dungeon unlock steps, key farming, and the current Shadow, Rune, and Double dungeon routes.