LSMF,
First, Google "Ivy league academic index." This provides a very rough approach to the combination of scores and grades needed for an athlete. Read various blogs about how the AI is used. There is a small degree of leeway if your kid is a super stud - not much, but e.g., the schools can get a kid in with a 28 ACT under perfect conditions (extremely rare).
Basically, for academics a player should take the High School's most rigorous cirriculum offered. (Begin looking at that now - reach out to the HS guidance counselor for help, if needed.) If the HS doesn't offer a full range of APs, don't worry because kids are viewed through the prism of what the HS offered. But, take the most challenging cirriculum that your kid can dominate. (On college tours, one question always asked was should a kid take an honors class and get an "A" or an AP and get a "B." The answer was always, take the AP and get an A.)
Work on the baseball skills. Here, you have time because the whole system is geared to recruiting a kid as a rising senior. This doesn't mean don't get on the radar earlier - just the Ivy rules are written and clear. (Google "Ivy league recruiting" and go to the actual Ivy League website. You'll need a law degree and a week to diagram the rules, but it can be done and understood.) The time to get viewed and get placed on the "follow list" is as a rising junior; additionally, if you're traveling and looking at any Ivy, and he has a year or two of grades (and maybe a score or two), drop in on the coaches with that transcript. The transcript is the weed out - so that is the first thing a coach will look at.
Returning to baseball skills, some Ivies recruit only middle infielders and only rarely outfielders (Yale which believes every HS SS can be an outfielder); but, every player recruited could have headed to multiple other D1s, so an extremely high level of skills is needed. Playing on any particular travel team will not make a difference (though some travel coaches can call an Ivy coach with a heads up, so connections are good) - individual baseball skills make the difference.
I don't know where the Ivy coaches now congregate during the summer, but during our era, it was Stanford and Headfirst. Son did both as a rising junior and rising senior. It was a goldmine of schools which academically fit our consensus needs.
A broad generality: 32 ACT + top baseball skills will get a serious look.
If you have specific questions, feel free to PM.