Either Treads Upon Stars or Hung Jury for legendaries. HJ has better base stats, but Treads has insanely good aim assist. With the right roll, it's unbelievable. Mine has Firely, Zen Moment, and Perfect Balance. I'd pick that over [i]any[/i] Hung Jury. The recoil is practically nonexistent and head shots (w/Firefly, of course) couldn't be easier. Jade Rabbit is my favorite exotic scout. Once you get the hang of it, it's ridiculously powerful.