I know 3 faster things for DKS, all of which are too hard to do consistently:
Aim to go into the far left side of the cannon, then try to get a miniturbo and wheelie around the turn.
Right after that turn, low trick off the first hill thing and then low trick off the second also.
On the part with the bumps, get 4-6 tricks like I did in my 36.049 flap.
The course is already hard enough to do consistently, so these are probably only worth doing if you're behind quite a bit or maybe on the first lap.
Edit: Actually, the second thing I mentioned, the double low trick, isn't too difficult... There might be at least one double trick in the next WR...