It depends. Would I be using chaos as a base, or AdMech?
Admech: would mostly be a heavy priest, heavy servitor list, with demon engines making up for things like onigers and kastilians.
Servitors would be a mix of "augmented demons", and chaosy 'tradition' servitors, though running them like 'tech spawn' might be interesting, where they have upgrades forced on them, and the rogue and possessed AI's in said upgrades are fighting them for control.
Chaos based: Lots of Dark Hellwrites, cultists and demons representing the forger workers, and the demons waiting for a chance to be interred into an engine.
Obliterators and maulers to represent combat servitors, made with more weapons than sense, 'tech spawns' as discribed above, pitious souls, with cybernetics forcibly grafted on with little rhyme or reason, rogue and possessed AI fighting and seizing control of the collective body at whim.
As many demon engines as I can fit.
Both armies would be run as smaller detachments, to represent the various wrights pooling resources to a singular (and temporary) goal.