Powerone, You seem to cover an excellent selection of the stories.

What I would suggest is the women in prison strory. I know it has been done to death, but it has so many slants.

The young female revoluntary sent to the prison camp, raped and tortured. She has to endure the heat and dirt of the jungle, where they are sent to work.
All the other females tell her about there lives and life since coming to prison. Ones addicted to drugs, one the prison whore, one the innocent virgin who has been knocked up but still has to work and gets raped as often as the others and another the mother figure.

All the women have to perform their bodily functions and front of each other and the guards - who take pleasure in this (essential for this type of story). No provision for personal care, and how they adapt in such surroundings.

There is a break out but they don't get far due to the country they are in and also they are tracked by dogs. So a bit of bestiality may come in at this point, though I think the other ideas are enough, as a good description of a woman beaten, raped and worked till she drops in the fields or jungle, gets me hot enough.