6 Stages. 1:2:1:2:1:1, with a total of 3 Enf, 2 HW, 2 Sin and 1 Sniper and u get the Shadow Ruby after completion of last stage. Slightly harder then last time and it is best to join as Sniper (like always).

The bonus is just top in the first 12 hours, so go for it fast (or dont do it at all). Good Luck!