The developers have never published the exact distribution formula for Classic World. What can be confirmed: Old MapleStory used damagecontribution distribution (the most widely circulated claim is the 80/20 model where “the top damage dealer takes the lion's share”); The community consensus during

Party Size Bonus: Caps at 4 Players (Measured)

Party size bonus coefficients measured by the closed beta 2 community: This means: The optimal grinding party is 4 players, not a full 6; A 6player party suits bosses / party quests (where you need hands to split roles), not pure grinding; In a 3player party each member's EXP share is usually “thick

Conditions for the Bonus to Apply

Classic World keeps the strict conditions of the early versions; miss them and you get no share: Same map: you must be on the same map where the kill happens (you cannot siphon EXP from another map); Within the level range: too large a level gap with the monster or the party gets you excluded or red

Party vs Solo: Doing the Math

Take Ant Tunnel III (capacity 99 monsters) from the [best leveling maps ranking](/en/guides/bestlevelingmaps) as an example: Solo: you keep every spawn on the map, theoretical ceiling ~2.05M/h; in practice at 50% that is about 1M/h; 4player party on one map: total kills stay the same (map capacity i

Special Note for Clerics

The Cleric is the glue of any party: Heal saves the whole party's potions, Bless raises accuracy and avoidance, Invincible cuts damage taken. In the closed beta 2 environment a Cleric solos on Holy Arrow (singletarget, high damage) plus low potion costs. In a party the Cleric's EXP share is diluted

Party Quests settle a fixed amount of EXP independently and do not use field monster distribution: KPQ (Kerning Party Quest, levels 2130): about 4,658 EXP per full run, with King Slime alone giving 2,400; it also drops equipment rewards. In the 2130 range, KPQ runs are usually faster than field grin

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Leveling

Party EXP Mechanics: Distribution Rules, Party Size Bonus, and the Optimal Party Setup

October 15, 2026 / 6 min read

The party EXP bonus is +10% at 2 players, +20% at 3, and caps at +30% at 4 — but the distribution formula has never been officially published. This guide separates the confirmed rules from unverified rumors for Classic World party EXP, and tells you exactly when partying is actually slower than soloing.

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