I don't think this is the best route to take. In terms of ease, I think the 14th route would be easiest (RLRR). Monument would be the hardest of the stages to deal with, since it has one really sharp turn (the first right turn) that'll punish you if you're taking it with a slipstream past max speed, along with a blind snake (it's not as harsh of a turn, but it requires a quick change in drifting).

Still, this is a quality run. I'm surprised I did this well with the stages I took. I'll have to check the rest of my runs to see if I did any better, since I'm not really paying too much attention to the times. I'm on that achievement grind, you feel?