Hello Everyone, Eklorin here. You may have seen me in Highkeep since the Kunark launch.
I have levelled from 51.2 to 57 so far by solo killing only Dyrna Nlith in Highkeep. Dyrna Nlith is listed on the wiki as a level 41 Necromancer in Highkeep who spawns once every 6:00, and takes me about 20-30 seconds to kill. I killed her exclusively to level from 20% into 51 to 10% into level 57, with the only exception was 1 or two random experience hits on a Trakanon raid. Dyrna remained blue con all the way up through and including 55. She started to con green sometimes at level 56, and more often at 57, but still conned blue rarely. This tells me she actually has a 3 level range, which starts to con green at 56 and would be 100% green at 58.
As boring as this sounds, it was actually quite a nice way to level for me, since I could AFK for 6 minutes and do stuff around the house and come back and nuke her 3 times
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Issue #1: The EXP curve for P99 Green after Level 54 is not the same as P99 Blue
I parsed my logs for the levels which I exclusively killed Dyrna, and got the number of kills for each level:
Dyrna Kills Per Level
Level 52: 125
Level 53: 138
Level 54: 227
Level 55: 247
Level 56: 267
Level 57: 50 kills wasn't quite 10%, estimate 550-600 kills
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The ratio of kills from one level to the next is then:
53 to 52 kill ratio = 1.104
54 to 53 kill ratio = 1.645
55 to 54 kill ratio = 1.08
56 to 55 kill ratio = 1.08
Relative to level 52, we have:
53 to 52 kill ratio = 1.104
54 to 52 kill ratio = 1.816
55 to 52 kill ratio = 1.976
56 to 52 kill ratio = 2.136
https://www.cs.mun.ca/~dchurchill/html5/p99exp/
If we load my EXP calculator linked above, it calculates the amount of EXP required to get each of 52, 53, 54 for a Halfling Druid as follows:
Level 52 Formula EXP: 24696485
Level 53 Formula EXP: 26712195
Level 54 Formula EXP: 43786165
Level 55 Formula EXP: 31889980
Level 56 Formula EXP: 34241420
These numbers match the values given on the p99 wiki "Experience" page
https://wiki.project1999.com/Experience
We can see that the formula (which is correct on P99 Blue) is no longer matching on green. Level 55 requires less overall experience than 54 on Blue, but more experience overall on Green. Also, each level gets progressively harder after 54 by about 8-10% per level.
Issue #2: It appears that the amount of experience required per level is also too high
From above, the ratios seem correct for levels 51 through 54, so let's use them to calculate the ZEM for Highkeep. If we plug the amount of Dyrna kills into the calculator, assuming level 41, we get the following ZEM values:
Level 52 = 125 kills = 118 ZEM
Level 53 = 138 kills = 115 ZEM
Level 54 = 227 kills = 115 ZEM
These values for the ZEM for Highkeep seem incredibly low. When I was leveling my necromancer there from 44 to 50 (also on Dyrna) I calculated a ZEM value of somewhere around 175. The only way that I can explain this is if the experience numbers required so far to get through levels 52, 53, 54 are approximately equal to that ZEM discrepency, which is 175/115, or about 1.5x as much exp as the formula states.
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I hope this data is useful to you somehow. I suspect once many people get 55+ they're gonna start questioning their sanity as I have.