I’m not sure about all the schools you listed, but I do know that Phillips Andover Academy isn’t using any standardized tests to evaluate students this year.
I would suggest you follow the schools you’re applying to on social media, which is a good place to stay updated on important information. I use Instagram, but other platforms like Twitter are okay.
For the schools that do require standardized testing still, I would suggest getting guidance books. I would argue that they contain all the advice, rules, practice tests, and answer keys you would need to get a good score. If you struggle with standardized tests (and if you can afford it), there are a variety of online tutoring programs specifically designed to help students improve there scores on SSAT, PSAT, etc.,