The moment the words "pyramid" and "training" come together you know you're going to be in for a tough slog to the top. Step-by-step here means that as you go up so do the number of reps you have to perform each time so this is a test on stamina, strength and mental toughness. Then again you knew all that already otherwise you wouldn't be on this page. Your aim here should be to complete the six-step pyramid, unless you're a Navy Seal type or are thinking for applying to join Special Forces in which case the ten-step pyramid is your thing.
Extra Credit: 100 Jumping Jacks before descending the pyramid.