Necromancer = Zombie Manager (its all about business)

Necromancer can be said as Manager in business term.

Managing many raised from dead blog.

Or just let Your Zombies become weaker then powerless.

I think that Zombies also need to feed, with contents.

As hunter, Necromancer gain more experience every time.

Two type of Hunters, the first one is raised Zombie only for sale and get profit and the second one is also use Zombies army to supporting their main one.

Empty zombie mean nothing, so Day by Day Your zombie is Being Lonely.
Full content also can mean nothing without popularity.

Combine that both. All above just my own ideas. Good Luck everyone, because Luck beat Master. :)