Title pretty much says it all. I have a group in one of my WIPS that are from a culture with simalar biology to an elf or an especially agile human. This culture grow up in a highly dangerous environment and is prized in other countries as assassins for their cold, relentless, and predatory nature. This culture have a group that are the top combat and covert operations students that become essentially royal guards and function as assassins and spies for the royal family. One of the mains in my books is the former captain of this group and was known for (in keeping with the theme so far) his capacity to kill anyone regardless of their status or appearance, sadistic nature, and ability to take out entire enemy encampments (20-55 men). However, I'm trying to figure out, in a fight how realistic or what ability levels would be required for such if its even feasible?