Yesterday i was playing a guy and it the score was close...he kept being "on" 6 or 8 points, the 6 and 7 were left and i did not know where to leave him in order for me to be at an advantage...one that sticks out, 7 on the spot and 6 4 inches off rail behind 4 spot...cue ball was just left of 7...I tried to play the cue 2 rails to get behind the 7 but hit it bad and sold out the 6...what is the right shot?