Mercenary weaponry and armor doesn't have a decrease in durability
Because of this, you need to take great attention when making a word. Double-check to ensure that the item's kind is right -for instance D2R Ladder Items, the Insight runeword is able to be made in polearms and staves but not spears . Lastly, arrange the runes in the correct order prior to attaching them to the item.
There are a few specifics regarding weapon and armor that you should make note...