Now that the event is over some fun final stats. After the first couple of days of overwhelmingly negative luck on the attacks I logged the next 100 battles. In 100 consecutive battles there were 77 that generated negative luck while only 21 with positive and two at 0 (even). Negative 30 (-30) hit nine times while positive 30 hit once. Only three times did positive luck hit back to back but never for three times in a row while negative luck hit back to back 19 times with one good stretch hitting 8 times in a row with the following numbers.....-4, -22, -26, -29, -30, -11, -26, and -18. Positive luck hit 6 times with a number 20 or higher and hit 43 times with a negative number of 20 or higher.
I've always felt this was one of the more "rigged" events but maybe it is just my poor luck that gives me these numbers every year.