This is my personal experiments attempting to find the rules of exp sharing after some time passed. All the formulas listed below are limited to be a theory. Keep in mind they might be wrong. I recommend to first know https://royals.ms/forum/threads/calculating-exp-of-leeches.123477/ if you didn't. (The intuition to come up with the formulas is largely relying on the leech exp formula discussed there.) By the time posting this I only have done tests on Skelegon - HP: 80,000 EXP: 4,500 and a few other mobs. I use Skelegon as main target of verification in this post. There is sometimes a tiny exp discrepancy (+- 1-2) between these calculation results and the ground truth, the real exp you get. This is I'd assume derived from how exactly the exp given to players is implemented in the code, the cascaded calculations, numerical operations, and maybe the loss of precision from data type conversion or something related to program interpreting the number. Chances are I'm wrong here. There're situations haven't been tested, such as: What if the mob recovers hp, for example Krex and Vikerola, how to calculate dmg% in this case. What if you're below -5 levels of the mob and do damage. What if you're below -5 levels of the mob and leeching from an attacker within 5 levels gap. Haven't tested with high level boss. Here exp formulas are listed case by case, all without HS bonus (1.5x). All final exp go through a Floor(exp), this step is omitted in formula. Definition: - mobexp = Monster base exp, 4500 for Skelegon - cptsize = factor of party size = (a) (1.1 + 0.05 * N) / (N + 1) if N >= 2 (N := party size) (b) 0.5 if N = 1 (1 man pt) or Code: 0.5 when N = 1 0.4 when N = 2 0.3125 when N = 3 0.26 when N = 4 0.225 when N = 5 0.2 when N = 6 - lv = leecher's level (who did 0 damage) - avglv = Floor(average party level) - dmg% = damage dealt by single attacker / total monster hp - party total dmg% = sum of dmg% among all attackers in pt 1. All damages come from only 1 party for damage dealer: exp = mobexp*3.2 * cptsize * (1 + dmg%) for leecher: exp = mobexp*3.2 * cptsize * Min(lv/avglv, 1) Spoiler: verify damages Spoiler pt1: attacker Lv139 54221/80000 (10699 + 16667 + 12537 + 14308) attacker Lv200 25779/80000 (80000 - 54221) leecher Lv190 leecher Lv200 leecher Lv142 exp gain (theoretical / real exp) Spoiler pt1: cptsize = 0.225 avglv = Floor( (139 + 190 + 142 + 200 + 200) / 5 ) = 174 attacker Lv139 4500*3.2 * 0.225 * (1 + /80000) = 5435.95 / 5435 attacker Lv200 4500*3.2 * 0.225 * (1 + /80000) = 4284.04 / 4283 leecher Lv190 4500*3.2 * 0.225 * Min(190/174, 1) = 3240 / 3239 leecher Lv200 4500*3.2 * 0.225 * Min(200/174, 1) = 3240 / 3239 leecher Lv142 4500*3.2 * 0.225 * Min(142/174, 1) = 2644.13 / 2643 2. Damages done by multiple parties for damage dealer: exp = mobexp*3.2 * cptsize * (party total dmg% + dmg%) for leecher: exp = mobexp*3.2 * cptsize * Min(lv/avglv, 1) * party total dmg% Spoiler: verify damages Spoiler pt1: attacker Lv200 46025/80000 attacker Lv139 17075/80000 pt2: attacker Lv190 2063/80000 (609 + 1454) leecher Lv142 pt3: attacker Lv200 14837/80000 (80000 - 46025 - 2063 - 17075) exp gain (theoretical / real exp) Spoiler pt1: cptsize = 0.4 avglv = Floor( (139 + 200) / 2 ) = 169 attacker Lv200 4500*3.2 * 0.4 * (63100/80000 + 46025/80000) = 7857.00 / 7856 attacker Lv139 4500*3.2 * 0.4 * (63100/80000 + 17075/80000) = 5772.60 / 5771 pt2: cptsize = 0.4 avglv = Floor( (190 + 142) / 2 ) = 166 attacker Lv190 4500*3.2 * 0.4 * (2063/80000 + 2063/80000) = 297.07 / 297 leecher Lv142 4500*3.2 * 0.4 * Min(142/166, 1) * 2063/80000 = 127.06 / 127 pt3: cptsize = 0.5 attacker Lv200 4500*3.2 * 0.5 * (14837/80000 + 14837/80000) = 2670.66 / 2670 3. If you are not in any pt exp = mobexp*3.2 * 0.8 * dmg% 4. If you are not in any pt and Last hit exp = mobexp*3.2 * (0.8 * dmg% + 0.2) Spoiler: verify damages Spoiler pt1: attacker Lv190 4202/80000 (113 + 1883 + 2206) leecher Lv139 leecher Lv142 unpt'd: Lv200 40441/80000 Lv200 Last hit 35357/80000 (80000 - 4202 - 40441) exp gain (theoretical / real exp) Spoiler pt1: cptsize = 0.3125 avglv = Floor( (139 + 190 + 142) / 3 ) = 157 attacker Lv190 4500*3.2 * 0.3125 * (4202/80000 + 4202/80000) = 472.72 / 472 leecher Lv139 4500*3.2 * 0.3125 * Min(139/157, 1) * 4202/80000 = 209.26 / 209 leecher Lv142 4500*3.2 * 0.3125 * Min(142/157, 1) * 4202/80000 = 213.78 / 213 unpt'd: Lv200 4500*3.2 * (0.8 * 40441/80000) = 5823.50 / 5823 Lv200 Last hit 4500*3.2 * (0.8 * 35357/80000 + 0.2) = 7971.40 / 7971 5. If someone in pt died and stay in the map N of cptsize and average party level degrade to those who are alive. e.g. In a 3 man pt 1 member is dead, cptsize = (1.1 + 0.05 * 2) / 3 = 0.4 instead of (1.1 + 0.05 * 3) / 4 = 0.3125 e.g. In a 4 man pt 3 members are dead, cptsize = 0.5 dmg% and party total dmg% remain unchanged (meaning, dead attackers' dmg% still count into party total dmg%) Spoiler: verify damages Spoiler pt1: attacker Lv139 1/80000 (80000 - 79999) attacker Lv190 dead 79999/80000 leecher Lv142 exp gain (theoretical / real exp) Spoiler pt1: cptsize = 0.4 avglv = Floor( (139 + 142) / 2 ) = 140 attacker Lv139 4500*3.2 * 0.4 * (80000/80000 + 1/80000) = 5760.07 / 5759 leecher Lv142 4500*3.2 * 0.4 * Min(142/140, 1) = 5760 / 5759 6. If someone in pt left the map Anyone leaving the map is seen as outside pt. N of cptsize decreases and his dmg% is deducted from party total dmg%. ----- Another experiment Spoiler: all in one damages Spoiler pt1 attacker Lv200 dead 16547/80000 (6016 + 10531) attacker Lv142 leave map 4709/80000 leecher Lv139 +HS pt2 attacker Lv200 +HS 9612/80000 attacker Lv190 +HS leave pt and Last hit 49132/80000 (80000 - 16547 - 4709 - 9612) exp gain Spoiler pt1 cptsize = 0.5 avglv = 139 leecher Lv139 4500*3.2 * 0.5 * Min(139/139, 1) * 16547/80000 * 1.1 = 1638.15 / 1638 pt2 cptsize = 0.5 attacker Lv200 4500*3.2 * 0.5 * (9612/80000 + 9612/80000) * 1.1 = 1903.17 / 1903 unpt'd Lv190 Last hit 4500*3.2 * (0.8 * 49132/80000 + 0.2) * 1.1 = 10950.50 / 10950 Extra - To reflect on one of Sylafia's finding: leecher exp is capped at half of the exp mage gets? Yes when the single mage does 100% damage on mobs. In this situation exp formulas can be simplified as following: mage exp = mobexp*3.2 * cptsize * (1 + dmg%) = mobexp*3.2 * cptsize * 2 leecher exp = mobexp*3.2 * cptsize * Min(lv/avglv, 1), max at leecher level >= average party level, exp = mobexp*3.2 * cptsize * 1 In your dream, beside a fire in a great hall you start dancing with balrog. You think about those people you met who have quit, who are banned, who are still active on the field, their words, those times you've made together, and the exp formulas. Sometimes Rich Text Editor comes to your dream, throwing you unexpected BBcode tags. When you see those weird Spoilers out of nowhere you realize it's not reality. You wake up, open the BBcode Editor, say shiiit and start to remove those dummy tags manually.
