Seems nice project and u can make some unique things like this:
About enchant rate:
Safe/max +15 but the enchant scrolls will be expensive.
Safe/max +6 on armors; enchant scrolls way harder than weps.
safe/max +6 on jewels; enchant scroll price is above >
By events +7 armor or jewels, +1 enchant or if your server have donate add +7 armors/jewels on the list.
By events +16 enchanted wep,+1 enchant or if your server have donate add +16/17 weps on the list.
Spoil drop seems too much.
About changing 3rd class i dont like it, because everyone will exp to take bogs instead of playing oly for them.
What about raid boss jewels? they are on the shop too; they are buyable with the custom coins?
Thanks for your time reading this, hope i helped abit.