You are likely to hear lots of advice from people with no direct experience. I have relevant experience and am currently a teacher of A Level Law. The answer is you can take ANY A'levels (except critical thinking, citizenship & general studies), none are better than the other. Your main consideration should be which will you likely get the highest grade in, when you apply for training contracts to apply to top firms you will need high UCAS points, they are unconcerned with the fact that you took harder subjects such as economics which is why your grades are lower than the candidate with business studies A Level for example. Don't listen to advice saying A Level Law is a waste of time, universities such as Oxford, Birmingham, Warwick and Kings College all accept both the A Level and BTEC Level 3 law and I have had students going to ll these destinations and more to study Law Degrees. The good thing about doing law at A level is that it gives you a grounding and foundation in the subject and also helps you decide if it for you or not before committing to a university course, bear in mind tht the AQA specification is the one that is more in line with university study.