Exploitable bug: you can literally use any item at any position. To do so, drag an item from its equipped position onto another in your inventory to swap them. This allows you, e.g., to equip an armor as boots which will heavily boost your total armor. The min. damage of a weapon corresponds to the armor rating and vice versa, all other stat bonuses such as resistances are added as well. At the the ring positions, no armor is granted, so fish-of-luck-rings are a good option.