Necros are way to dependent on other players
Necromancer always performed better in the presence of trash mobs, whose deaths fuel shroud. Greatsword and shouts further improved that crowd control specialty.
Similarly, it’s weakness is in scaling up against more active and capable opponents where deaths are absent, crowd control skills and AoE have little or no effect, and boon-sharing dps professions synergize.
On the topic of crowd control, a lot of the important skills that necro has, has long channel times. which means you are forced to run one of the only 2 two stability skills just so you can cast your other channel skills