exp-modifier: used in formula to calculate exp to levelup
ExpToLevelup=baseExp+baseExpโcurrentLevelโExpModifier
Example: base-exp = 100, exp-modifier = 0.1, item level 9 require 190 exp
stat-modifier: used in formula to calculate new lore stat leveled up
Stat=originStat+originStatโstatModifierโcurretLevel
originStat is stat of item level 0
Example: stat-modifier = 0.2, Item has 4.6 damage in level 0, then item level 5 has 9.2
buff-modifier, enchant-modifier: each 1/modifier level increase buff, enchant level by 1
Recommend value: 1 divive equal a integer (0.1, 0.2, 0.25, 0.5, 0.333333333)
Example: enchant-modifier = 0.25, item has SHARPNESS III in level 0, then item level 4 has SHARPNESS IV