There are about 20 including a few that are sharper than 90*. I have no idea what my fitness is (PR is in the very low 15s but I think I underperformed there as it was a tactical race; 3k PR suggests mid 14:40s) as I'm rebuilding, but I did a long sub-threshold session a week ago at around 5:20 pace. I think 15:30 is a good goal and typically would wear the Vaporfly, but there are about 20 turns including 4-5 very sharp ones where the cornering could be an issue.
Would wearing the Sinister or Streakfly be better? I think having a strong kick will be more important than a slightly faster shoe for most of the race.