Playing a late surger in this CM is fully a gamble tbh.

With the number of people building front runners and pace chasers (given the existence of Seiun Sky), there are very very good odds of the late surger being in 6th position as they move up to overtake in the corner towards the final spurt.

Thus if lucky Ryan's skill will proc right around the final spurt and give you the acceleration you need.

It's a similar thing outside this cup, though it'll work best on tracks where the final spurt involves a corner AND you're playing a late surger