Started KEM Farming
After playing the game for a long time I decided to start KEM farming. My bonus is almost 400% and I'm farming with about 128 KEMs (16×8). I am using the XP collider. I read about KEM farming online and some say they recommend buying the mystery box with donuts acquired and pay for 10 days of xp colliding. What do you recommend doing with the donuts? I'm thinking of using the yearbook to get the Springfield Sign.