From the moment i saw those screws in Jolina's back i expected them to play a role in her death. That was a simple and very brutal way to do that. Jolina was gagged through all of it, she could scream but never try to talk her way out of it or talk to Jessica. And now Jessica can watch the corpse of her friend for a while to increase her own horror before the guys eventually come back to her, great! And i imagine when the guys come back they will bring more girls.

I can't really make any more suggestions right now, what you are doing so far seems very much in line with what i was hoping to see. Right now i'm just curious what exactly you have in mind for Hazel, she will probably end up drowning, but that's all i can guess from that picture.