So far it seems the main characters (or at least those mentioned in any detail) are Monn, Raxell, Schiffer, Ha'Bazz, Brass, plus the DE character, and possibly a Tau. If there were to be alliances formed between this lot, the only obvious one is Schiffer/Brass, with Brass getting stabbed in the back as soon as Schiffer's gotten away with her dastardly plan (if they escape at all). Is it possible there could be a Raxell/DE alliance at all? Raxell might acknowledge the severity of the situation, and possibly enrol the DE to take out Monn when the situation becomes too chaotic. Plus the DE has an offer of escape, even if there's a 99% chance of a backstab.
On a side note, I'm guessing the Tau would be shared between the different writers? I know nowt about Tau, my knowledge has come off the ever-reliable source of Lexicanum

, so if someone has a better idea for them, go ahead, but I was thinking possibly make them a member of the earth or water caste. If they're earth, Monn could have been trying to torture them to learn about Tau engineering, industry, science etc, whilst if they're water, it could be a high-ranked Tau ambassador or administrator, who Monn is using to learn about the background of Tau culture and society. Tau are mostly chaos-neutral, aren't they? Maybe the fact they are untouched by the warp could be part of Monn's research.
I like the idea of a "lights-out" section with Monn's men hunting down the inmates. Maybe partway through this section a few tyranids could leak into the immediate area? Turn the tables somewhat.
Finally, even if the plan is to have everyone obliterated when Ha'Bazz detonates, I'm guessing the inmates are still attempting to get out. Are there escape pods hidden somewhere? Is there a hangar bay? Both? Or a more ingenious method of escape I haven't thought of?
