There are many nuances when it comes to D2R Items weapon and armor types that you should make note of. "Body armor" is only for items that are worn on your torso. General "armor" includes shields, boots, gloves, helms, etc. Hammers will not work with runewords intended for maces. "Melee weapons" are not weaponry that can be ranged, such as the crossbow and bow. Orbs, too, aren't considered melee weapons.
When creating runewords, many contain varying stats that will determine how good of a roll you've made. A well-constructed runeword roll is always worth a lot more than a mediocre roll. Also, using the best runeword base (an item that has sockets) should be the most suggested. In the case of making a runeword that you can equip on a mercenary choose an Ethereal base. Mercenary equipment and weapons never have a decrease in durability, which means you'll receive the benefit of stats gained from the Ethereal property and not worry about it ever breaking. Every single boost to stats can be counted for Diablo 2: Resurrected.
Runewords can be used on any type of character. They will receive bonus points if specified. This means that you can put for instance, a Beast runeword on the Sorceress and grant her the power to transform into the form of a Werebear. This allows for a variety of builds and gives players a variety of choices in terms of entertaining play styles.
It doesn't matter if you're completely new Diablo 2 or you're coming back from a long hiatus I've also prepared this collection of 15 beginner-friendly tips and buy diablo 2 resurrected items techniques that will help players play Diablo 2: Resurrected. If you're concerned you won't be able run Diablo 2 to its full potential, have a review of the top laptops for playing Diablo 2: Resurrected.