For the most part I think you're right, but this weeks Heroic (Val Tul'rik or whatever that big dudes name is). You can basically skip everything in the strike leading up to the lieutenant fight (inside master chiefs head). This is where the hair is split. You [i]could[/i] fight all that non-sense on the way to the first lieutenant fight, or you could run and jump along the left path and just skip it all (minus a couple that get in the way -circumstantial). Devils lair is the same. No [i]need[/i] to fight anything until you get to the hive vs fallen room. Pick your poison. I'd rather sparrow all the way there, some run and pop a few enemies along the way, some go out of their way to kill every last thing standing like a patrol... If you're moving and heading straight for objectives (minus a kill or 2), you're more in the [i]runner[/i] category.