I think a hugely overlooked item is a bottle of betadine. Getting a cut to stop bleeding with quick clot or a tourniquet is great, but getting the wound clean is hugely beneficial. Especially if it’s a cut sustained during processing… that wound is almost guaranteed to get infected. The first thing the emergency room does is wash out/irrigate the wound before sewing it up and when it comes to bacteria, time is a huge factor. I had a friend lose his leg from a wound that wasn’t even bleeding but it was a few hours between the injury and when we got him off the mountain, and in that time an infection set in. Required several surgeries that probably could have been avoided if I’d had my little bottle of betadine with me.
I carry a 2 oz bottle of betadine in my kit and if there’s a wound, I’ll dump the bottle into my camelback or water bottle, dilute it with water, and irrigate out the wound. Obviously once the bleeding is under control.
My other must-have item is a few packets of oral rehydration powder.