Really depends on how you ride. I have 36 front, 11-42 11-speed rear; the friend I ride with most regularly has 34 front, 11-42 11-speed rear. We spin out pedaling down hills - but we don’t care to hammer downhill anyway.
My drivetrain (Shimano XT) could also handle an 11-46 cassette, so that might be an option for you too.