Bio chem maths is the most popular A-level combo. Physics A-level is much much harder than GCSE in my opinion, and I'd avoid taking it, however, with Maths alongside Physics, it's not a bad option. For chemical engineering or pharmacy, Biology is better. For architecture, geography or physics is better, but honestly, I don't think it makes a huge difference for most universities, as long as you have Maths and Chem for chemical engineering and Maths for Architecture i believe. I'm more thinking about how you can link your subjects to your course when you write your personal statement. A level bio is very specific about how you word things for mark schemes, but should be fine with good revision and memorisation. From my experience, Physics has a lot more applied questions, rather than recalling facts. It also has much more maths questions which is helpful since you're taking maths. Also, remember with Geography that you'll have to write an NEA, which is a long coursework project, so if you don't like coursework that's also something to consider. I wouldn't say you're at a disadvantage if you don't take Art, but I'd look at course requirements at different unis to find out. I have a friend applying to Architecture with Product Design, Maths and Physics. She has 4/5 offers (Cambridge rejection). At the end of the day, take everything what I say with a grain of salt. I may be wrong and I think this is very opinionated. Maybe look at the specs of the subjects you wanna study to find out more about if you'd enjoy the modules or not. I also may not be very accurate with what I'm saying, but I hope my opinions were somewhat useful