combined or triple science

idk which to do but basically my sch have a system where through year 9- mid yr11 theres 3 science sets, if ur bottom set study for lower combined science, 2nd set study for higher combined and top set study for triple science.but my sch is **** and we always have subs for science so if u want to pass exams u have to learn at home bc half the time we dont get taught stuff we need for exams and yr10 and 11 were complaining after exams and mocks that they hadnt learnt much of the stuff in the exams. everyone in y10 who got high in mocks said they had to search about the curriculm and topic lists and learn ab that at home. u can change sets after every test depending on how u score. im finishing y8 rn so i had to do a end of year science exam and they put u into sets based on that for start of yr9. i want to be a paramedic for reference. im js above avg in physics and chem and good at biology i think ill get set 2. idk if doing triple is important to become a paramedic tho however i need to do a science at alevel. is there a point in proritising studying science over other subjects to make sure i move to top set? i dont like chem and physics. is there a point in doing triple basically?