For the 750,000 board I used the Zen shot character and chose Beyond Reason for the level. Try to get the green peg and knock out a peg or 2 towards the bottom of the "double helix" and then when using the Zen shot with your next ball get it to land inside the double helix and it will be carried to the top hitting every peg in the center and giving you near 400,000 points if you can pull it off. Then clearing the board and getting an ultra fever isn't to difficult given you got 3 extra balls from the Zen shot. I beat the level with 980,000 points doing this. However, it took me many tries to do it. Man this game is cool!