While running low level Scarlet Halls on your level 85+ toon, acquire a few G91 Landshark from AH or Blingtron.
Make sure nobody in your group grabs an archery target or they will get stuck with it until they zone or log out.
They have a 45 yard range so just use the G91 Landshark on Commander Lindon and it will kill all of the archers. You may get knocked back once, but it only has a 1-second cast time.