When you start a new game and level up, do not place your points. Instead, save them. By the time you defeat the Boss for the Plain Of War you should be at level 6 and have 15 attribute points. Go to the side mission with the Four Horsemen. Before you start the fight with them, add all 15 of your attribute points. Because this does not work with players abilities, do not worry about upgrading them. Resume the game and die. You will be prompted to try again. Do so and follow through the same process. When you go back to level up the attributes, the 15 points you placed earlier will be there, plus you will have 15 points to spend again. Do this as many times as desired.