As a Nico player myself, I have found Necropunks to be incredibly useful. They are fairly cheap, have pretty decent mobility (especially if you get Leap to work), are great objective runners, and can do a good job of locking up the edges against opposing objective runners. And with reattach they are really difficult for small units to kill.
Ditto to what has been said about the Belles.
Punk Zombies are pretty straight forward, though my personal preference is to summon them mid-game rather than higher them from the start.
Flesh constructs seem to be all too commonly overlooked. I find they are great units. Decent mobility, lots of wounds, effective regenerate 1 due to embalmed, and they hit pretty hard. Yeah their defense is terrible, but even if they get focused down they provide pretty good AP soak. And if your oppenent isn't careful with their control hand they get reactivate. All for a six point model.
If you can get ahold of the Graveyard Spirit he makes a great totem.