Bukkit

What is the expected output? What do you see instead?
Lore attributes don't work at all on weapons. However, they work on armor.

Lore attributes make all bosses in epic boss have +20 Health. (when they should have 500ish)

What version of the product are you using?

Latest.

Do you have an error log of what happened?

No.

Please provide any additional information below (what lore you have on the item, steps to reproduce, etc.)

Make lore on weapons work please.

Mob Arena :
LoreManager Class line 443 entity.resetMaxHealth();   could be resetting mobarenas boss health
in the appleHpBonus method
applyHpBonus
and getHpBonus  same class for (ItemStack item : entity.getEquipment().getArmorContents())   he needs to getItemInHand also not just the armor contents
thats why weapons dont work

If you have github I could just do a pull request to fix this for you ...