What you do is you fight a certain monster over and over again - once that you know will drop 2 stat spheres (e.g. strength) when you kill it. Keep doing it till you've got enough. Then you buy some clear spheres from the guy (after you've got 5 of every monster). You go through the grid removing ANYTHING which isn't a +4 stat or +300hp, +40mp and replace it with the new +4 stats you've been collecting, activating as you go. Then when you get to 255 with a stat you move onto the next one.