“most rigorous” doesn’t mean you must take all APs! It means balancing your schedule so that you have 4 years of English (typically including AP Lang), 4 years of history/social science, Foreign language through level 4 or AP, biology/chem/physics+1 more class preferably AP, and math through precalculus or calculus (honors or AP). You should have 6-8 AP’s TOTAL over 4 years of high school, as well as relevant electives (that show your intellectual curiosity and/or your personal interests). Taking an art class is often useful as it’s required by some state universities.