Is this viable?

HQ

The Nightbringer


Fast Attack

6 Scarabs
6 Scarabs
6 Scarabs


Elites

10 Pariahs


Spearheads

Monstrous Spearhead
-> 6 Tomb Spyders

Monstrous Spearhead
-> 5 Tomb Spyders

Monstrous Spearhead
-> 5 Tomb Spyders