Your ECs are fine and interesting.
This isn’t something to game. You need to be yourself. You want to build tenure and impact.
Ivy Leagues schools are not the same Which do you prefer and why? And what other campuses are similar? Ivy is an athletic conference - but where do you want to be and why, etc?
There are many great schools and depending on the Ivy, there’s a 90% + chance you’re not getting in. They’re also $90K a year - can your family afford that? Do they want to afford that when your stats might get you into great schools at $20K a year?
So keep being the best you - and you’ll find many schools, Ivy or otherwise, to get into.
I know many here post the blog from MIT - and it might be a good read for you.