i would pick a military grade survival knife (with included utensils- sharpener, matches, string, needle)
I can make fire with nothing (its a good skill to learn and practice- it will surprise you how difficult it is at first)
The teams that didn’t bring firestarters really struggled on the fire front. All of them knew of ways to make fire with just found items, but the setup is such that it’s going to be harder than you practiced. They always meet somewhere not the camp sight, so step one is find the/a campsite (pretty sure the LA team didn’t find the intended campsite the first time, which means hiking barefoot with no food or water for a couple of hours. So before they’re even to the point of thinking about fire they’re already tired, in pain, over heated or chilled (depending on environment), dehydrated and hungry. And now they have a few hours of daylight left and get to choose between shelter and fire, and fire is a lot of vigorous action. None of the teams that lacked the spring loaded flint got fire on the first day, most suffered until day 3, they tried but they failed.
It’s an interesting show, it’s basically caveman survival.