This should be able to be fixed by adding an IItemTier parameter to each setWeaponCapability override, but these items should probably just extend the relevant epicfight classes (SpearItem, GreatswordItem, etc.) instead of WeaponItem

In previous versions, (Though I haven't checked the most recent build), SpearItem and GreatswordItem didn't accept the correct ItemTier class, which meant I had to skip them. Updating to the latest version of Epic Fight shouldn't be too hard.