Thief guide: breakpoints, builds and what Haste really costs
Type in your stats and weapon, and see how many attacks each monster takes with Lucky Seven, Double Stab or Savage Blow. Worked out from this version's own skill numbers and damage formula, which aren't the old MapleStory ones, so you can check every answer yourself.
Your breakpoints
Attacks per kill: 1 · 2 · 3+. "1–2" means 1 on a good roll and 2 on a bad one, if every attack hits. "Hit" is your chance to hit that monster; MP and EXP per attack include the misses. Lucky Seven throws 2 stars per attack. Crits count in the average, not in the "every time" number. Counted: weapon defence, the penalty against higher-level monsters, accuracy, crits. Crit rate and damage: copy them from your Stats panel; left empty, only your crit skill is counted. Maps are ranked by EXP per attack with each map's monster mix; spawn speed, walking and other players aren't counted, so treat close ones as a tie.
The three routes
No route is "the right one". Here's what each gives you, so you can pick what fits how you play.
🌟 Assassin (claw)
Lucky Seven from level 10, then Claw Mastery, Critical Throw and Claw Booster.
- Attacks from range, safer on busy maps
- Claw Mastery: +20 Attack and up to 25% of stars back
- Stars cost mesos; better stars are a big damage step
🗡️ Bandit (dagger)
Double Stab in 1st job, then Savage Blow, Dagger Mastery and Steal.
- No stars to buy
- Savage Blow: 4 hits at 65% at level 1, 6 at 75% at 30
- Defence takes the same share off every hit, so many small hits aren't punished extra
🔁 Lucky Seven → Bandit
Use a claw and Lucky Seven early, then choose Bandit at the 2nd job change.
- Easier early levels, dagger later
- Usually needs an AP reset to move stats to what your dagger needs
- Pick your dagger first: STR and LUK daggers need different stats
Checked against players
The formula is the one OSMS Data Explorer read from the game client. These are the players' claims we've tested it against so far.
MatchesA player's own damage maths for a level 45 dexless Bandit (220 LUK, 47 STR + DEX, max Dagger Mastery) gave 385.8 and 487 for the stat part of the formula. This page's formula gives exactly 385.8 and 487.
MatchesClaim: max Dagger Mastery and Double Stab 1-shot Zombie Mushrooms and Evil Eyes around level 36.
With about 150 LUK and a Halfmoon Zamadar, Double Stab 20 does 526–658 to a Zombie Mushroom (436 HP): every time.
To an Evil Eye (606 HP) it does 550–688: most of the time.
Doesn't matchClaim: at level 41, Savage Blow 12 and a level 40 dagger 1-shot Curse Eyes.
With 175 LUK, a Gephart (58 Attack) and max Dagger Mastery, Savage Blow 12 does 588–736 against Curse Eye's 1,001 HP,
and still at most 869 with 220 LUK. So without crits or extra Attack (a scrolled dagger, Steal's buff) it takes 2. If you 1-shot them at 41, please tell us your stats below.
Does a number look wrong?
These numbers are calculated, and the formulas aren't confirmed for this version yet. If the game shows you something else, tell us. Your calculator settings are sent along, so we can find what's off. Nothing else about you is.
Questions
Should I max Haste or Claw Mastery first?
It's a choice between speed and damage. In this version Claw Mastery adds up to +20 Attack, so points in Haste cost you real damage. Set "Points in Haste" in the calculator to see which monsters you'd stop 1-shotting, then decide if the speed is worth it to you.
Can a level 41 Bandit 1-shot Curse Eyes?
Not with normal gear, by the game's formula. Savage Blow 12 with a level 40 dagger and max Dagger Mastery does 588–736 against 1,001 HP, so it takes 2. Crits and Attack buffs can change that; the calculator shows your case.
Does Claw Mastery help Lucky Seven?
Yes, through its +20 Attack at max, which raises every throw, and it returns up to 25% of your stars. Its mastery doesn't: Lucky Seven uses its own fixed mastery (50% of your LUK for the low roll).
How much does an SP reset cost?
Players report about 100–120k mesos when bought from other players (November 2026). Prices change, so check your market.
Data and damage formulas from OSMS Data Explorer, CC BY 4.0 (reshaped for this calculator). Skill descriptions: Thief skills. Route notes and checked claims: players on r/MSClassicWorld.