There are basically 3 ways that you will be getting all your points.

1. From the start, go forward and beginning grinding on the fence, doing flip trick to increase multiplier. Continue the combo onto the roof, and then manual down and use on the the ramps.
2. After line #1, go the opposite way, using grinds, manuals and flip trick. Special grinds will really help here! Continue all the way down this line and then transfer over onto the small boxes, getting off with a manual and finishing with a big spinning grab trick.
3. You can also use the halfpipe where Line #2 ends to rack up some easy points in between combos.