Pvpe and skull! FAST thanks!

[Ripags]

Hi guys need some help. Player are gaining too much exp from killing, between one 55 vs 50 lvl the 50 lvl when killing 55 goes to 110!!!!
I also have pvp-enforced, and when i activate pvp normal, one kill and ppl go black skull!!!

worldType = "pvp-enforced"
hotkeyAimbotEnabled = "yes"
protectionLevel = 20
killsToRedSkull = 25
killsToBlackSkull = 40
pzLocked = 60000
removeAmmoWhenUsingDistanceWeapon = "yes"
removeChargesFromRunes = "yes"
timeToDecreaseFrags = 24 * 60 * 60 * 1000
whiteSkullTime = 15 * 60 * 1000
stairJumpExhaustion = 2000
experienceByKillingPlayers = "yes"

-- Rates
-- NOTE: rateExp is not used if you have enabled stages in data/XML/stages.xml
rateExp = 2
rateSkill = 13
rateLoot = 4
rateMagic = 5
rateSpawn = 2
rateExperienceFromPlayers = 0.2
minLevelThresholdForKilledPlayer = 0.7
maxLevelThresholdForKilledPlayer = 1.6