The trick for easier A-Levels is to choose subject heavily related - Further Maths, Maths and Physics (with Bio / Chem) would be a great choice because revising / improving on one will improve the others.
I like Maths so maybe I'm biased...
If you aren't sure of what you want to do in University, the best choice (in my humble opinion) would be Maths, Physics, Biology and Chemistry. If you want to do a Maths degree most universities don't require Further Maths but expect higher results in normal Maths (such as Russell group unis). Of course FM helps with every subject above but could be viewed as unnecessary; it'll help with Maths but help not so much with Biology, for example.
You make the decision. Biology, Chemistry, Maths and Physics is my suggestion - perhaps not too well informed because I do Maths and Further Maths!
I hope I helped in some way.