Well, first make sure you have atleast 200 BP if your going for omnislash, it will probably take 7-10 wins to get the necessary points, I usually play the bball game since it is very easy to get the hang of. I was at lvel 50-55 (about 5,000-6,000 hp) on the second disk when I went for omnislash, watch the slots closely and pack alot of remedies, maidens kiss and whatever the potion it is that counters the mini spell. some times the slots are just against you and you will lose just have alot of spare BP, the monsters I would have trouble with would be the two headed zombie thing and the dragon, but if you are prepared every other beast is a breeze, o and make sure your characters are very close to preforming their limits since it will help you in the final fight were your could be extremely hurtin by the affects of the slots.