A BS/MD program is not for everyone. It’s only appropriate for very mature, focused students who are absolutely sure that they want medicine - and have done shadowing, and some type of clinical contact work, like Red Cross blood drive ambassador (although I think the pandemic killed that) or high school CNA class, or EMT class.
If the person is one of those, I’d suggest that their AP load should include, if their school allows it, AP Bio, Chem, Physics C, Calc BC, Eng Lang, an AP history, AP Spanish (the most useful language in medicine in the US) and as many other of the serious APs as possible, while still achieving a very high GPA. The idea is that the person is demonstrating their academic maturity, and enters a condensed undergrad experience having already shown that they can handle high level work.
This is an extraordinary load, but these are the students against whom one is competing for entry to condensed BS/MD programs, assuming no preferential acceptances for non-academic criteria.
Sure, this is not the best course of action for most high school students. But most high school students don’t belong in a condensed BS/MD program.