Take all dash plates on the first lap. And (:P) don't let your car slip at all. But even if you fail to do it in the middle, keep running this way to train yourself.
From the 2nd lap, keep boosting except when you are running out of energy just before the pit zone, and for the little jump after the 360deg loop.

On lap 2,3, as shown on the picture stay as close to the inside of the track as possible to take the sortest line. In my case, I do some side attacks here, and also before the tunnel. But it's better with no side attack.
Then going through the tunnel, I take the pit zone on the left. When passing on the dash plate after the pit, just use the 3D stick to do it fine

Do not boost when you jump, only after landing. For the 3rd lap too run thinking of the shortest line

You're close to the end. You should have consumed all your energy by the time you reach the line. If not, you made a mistake somewhere (and the staff ghost is very close behind you)

This track has a wide path, giving you some margin. But it's getting very hard when trying to beat the staff ghost. This track is ideal for GP. In this mode being able to run against 30 rivals is very fun :-)