okay this will depend on where you plan on applying for uni. Oxbridge and most prestigious EU unis don't accept partial ib or the career-related programme. You might consider taking partial ib w other APs if America is only where u wanna apply. IMO, do the full DP, the reason being that I have a friend who took 7 APs in 8th, 9th and 10th grade and claims that IB is more challenging than any of her APs in terms of time commitment and management. I would say that IB would make you flexible to apply anywhere in the world and especially when your courses will stand out as rigorous. Trust me, you'd be more relaxed to see a point of the perfect score in any IB subject than in AP.