There are no required subjects for Law, so which A level subjects you are taking is not significant - Unis will just be looking at your predicted grades, your PS and LNAT (if required).
With AAB, its worth having one AAA choice that is not mega-competitive - Liverpool for example - three choices at AAB (Sussex, Loughborough, Lancaster, Reading etc ) and one choice below that (Keele, Oxford Brookes, Plymouth etc).