Yeh the Cryx line of models would work as well. I have thought about using those to...
Either Asphyxious in one of his forms or one of the Withershadow Combine models as Leveticus himself.
Mechanithralls as Aboms.
A warjack as the DE.
Not sure about Ash/DE or Rusty....
As for the above, do you not think its too "sci-fi" or freaky?
Could it fit with the steam-punk genre that Malifaux is set in?
Could the models be converted to be more steam-punk? If so, how?
I was thinking of using slaves as the Waifs as they are shackled to Leve a slave-theme seemed to fit.
As for the Ashes & Dust breaking up, that could be done by breaking up that model into two parts. A stationary section and then a whirling mess of blades and spikey bits.
What about as I mention as using it as a "Raspi" crew? Pillars of Flesh just sounds icky and disturbing. But then I like Raspi in M2.0E.