Please reword the descriptions of the dual-element relics, so it's more clear that they buff Luck inherently, and from their dual typing. Dwarven relics would say that "[this] raises your Luck bonus by X", and that "This has a Dwarven Enchantment; it [also] raises your Earth and Luck bonuses by Y".
The same goes for relics that raise Luck, to say "this raises your Luck bonus by X", and "this [also] has a Luck enchantment, it raises your Luck bonus by X".