I finally did a suit only silent assassin run in Colorado. I was missing sniper assassin too, so I decided to knock it out at the same time. It was pretty tense and frustrating at times, but damn if I didn't feel like a badass sneaking around Colorado dressed as Santa Claus, with a big sniper rifle on my back, killing my targets without being seen. I treated it kind of like my string quartet run, opting subdue them first and then shooting them in the head with the sniper rifle before hiding the body. Except for Penelope, I shot her in the face point-blank from the top of the basement stairs then dragged her into the basement. It took me a few hours to do with all the reloading and the final run time was about 45 minutes, but it was totally worth it.