My son was talking to some Ivys over this past winter. He was told that his SAT scores needed to be at least 1350 so the coach would not have to use his "silver bullet" to get him in (my kid is a 2018).
Our process was that my son talked to his travel team coach (who has good relations with a lot of the Ivy coaches), and that was about it. Pretty sure the coaches saw my kid at last years fall WWBA, where he had a good showing.