Following Diablo 2 builds allows you to get the most out of your chosen class.
Though establishing a build is part and parcel of any RPG set up, Diablo expands it further with the ability to create and set runewords, giving you additional effects.
While they were introduced in the original Diablo game expansion, Hellfire, runewords didn’t come back until Diablo 2: Lord of Destruction, which re-introduced Runes into the game.
