You and a body start a normal RANKED match online; then on Swirl or Coral i belive 
contains the unit the LSM (Rocket) ship. Have the person on the U.S side make only 
those, and the jappenese side makes nothing but battle ships, or (DD) what ever. 
Then have the person with the rocket LSM's continuesly fire the (BB)'s until you 
reach your goal. Im not a game sientist, but from all the rockets you fire gives 
you a large amount of points.