Take a Vic Rucksack. Like mine. Great knife, but it's a little small for my hands, and the blade is a little lightweight.
Size it up to a 4.25" blade and saw. Double the thickness of the blade. Replace the plastic lock thumb tab with a metal one. Add a 4.25" file blade with coarse teeth on one side and medium on another. Add a multi-purpose hook. Add a penknife blade. If there's room on the back, add a Phillips screwdriver.