For an experiment, start out with the fastest cam, and cut down the first 1/3 to 1/2 of surface to match the profile of the #200. You can see this easily and mark it with the cover of the throttle off. That would be a very non-linear cam.
This stuff is all well and good for fun, but may not help you over the course of a long tough race, unless your like ML. Your terrain seems pretty open from some of your videos so perhaps its not a big deal.