I recently made a female cleric and equipped the [Crit] Glory Unicorn Horn and noticed it dramatically reduces my damage output. At level one i did only 1 damage even with a +6 mace and through following levels it decreases all damage by about 60%.
I'm not sure if it's all skin shields but for Blue Valentine Cleric Shield enchantment effects aren't shown through the weapon as if my actually weapon is +0.
Edit: Also everytime I equip a new shield it goes over the shield skin