Diablo 2: Resurrection Necromancer and Fishymancer Build Guides are available from Hulda Onions's blog

Because there were so many different builds available for the Necromancer character class in the original Diablo II game, it was difficult to keep track of all of the different builds. Some players' attention was drawn to offensive magic, Necromancy summons, physical attacks, and offensive improvement skills, while other players' attention was drawn to defensive magic, defensive summons, physical attacks, and defensive improvement skills. In addition to these main areas of focus, the group's efforts covered a wide range of other subjects as well. Since the release of the remastered version of Diablo II: Resurrection, the Necromancer's visual appearance has been significantly enhanced.