Why is Necromantic so woefully behind Undead in the rankings?

I'm starting a new league soon, and really want to use Necromantic. I've been using the team since 2002, back when wolved had catch, and always loved them.

I'm just struggling to make them effective.

I'm eight games in on BB2, and my record is abysmal. I'm trying really hard to understand why my Undead feel so much stronger. I think it might just be skilling up, since Wolves and Golems skill up much slower than Mummies and Ghouls. And while Ghouls just need one skill to hit blodge, the Wolves have to skill up twice. With just one extra movement over a Ghoul, and without dodge, means that the Wolves tend to not be all that much more effective maneuvering or scoring, over a Ghoul. And while Mummy mighty blow is always useful, claw is sometimes useless. Frenzy also is sometimes a liability rather than a strength.

What are some tactics that I can use to get more mileage out of my Necros?