Has anyone yet tried choking out all the butchers etc and packing them down into the sewers below the factory, then blowing up the place?

If so, does this result in a low or high chaos end to this first mission (assuming all other NPCs were dispatched with low-chaos of course)? I enjoy playing low-chaos best, but packing Rothwild off for shipment without opening all the valves then means I no longer can help Abigail Ames and I wanted to help her.

In other words, is there a way to help Abigail without landing a high-chaos ending?

I have knocked out all butchers although I had to use choke a grenade and then 3 sleep darts for 3 pesky butchers loitering in one area (may as well have used some) where I had to send Rothwild to a crate. I don't think it is possible as it kills a lot of people and destroys the surrounding area which is not really low chaos.

Oh, those last three butchers that turn up in the first part of the slaughter-house at the end (the bit you'd so meticulously cleaned of enemies when first there)?! THEY are a nightmare to take out non-lethally and without detection. They march fast and have eyes EVERYWHERE!

A pity though - I want to help Abigail but am too much of a baby to go through all that high-chaos at the end again!

Heh, I have yet to help Abigail even once, I'm curious if what she says is any different than what Rothwild himself does.

So far I have shipped him off in my low-chaos playthrough, and the very first time I played...

I just gave him an extra shock and left him there because I just don't give a [censored] like that. Hahaaaa.
I was rewarded with 3 butchers going after me in the next mission

The first time I played, I was just in blind survival mode. Abigail killed Rothwild on my behalf and I blew up the factory. It was all downhill from that point on!