We need First blood and we need mobility. We get that through outflanking, infiltrating and through the beast movement of the Scarab swarms. But we need the insurance later in the game that we won't get caught in our own mire. So i recommend at least one Night Scythe for a late game troop drop in a nice safe place. For First Blood, there isn't much better to try it with than Destrukteks. their mobile lances allow you to skirt the action at maximum distance, ensconced in a Warrior Squad while blasting the Rhinos and various and sundry metal threats. 5 Lances per round will do a lot of damage ot preferred targets and can pot shot the big boys like Wraithknights from 5 separated platforms.
So we have melee, we have objective stealing power, we have a small bit of anti-air, we have speed, we have anti-TEQ and MEQ, and we have the element of surprise. What more can a general ask for?
Nearly this entire force is two fisted to the very end.