I'm in the same position as you and I think your best option is to start looking at your work for your AS subjects now, as that was the advice I was given. Try to focus about 75% of your time on A2 and 25% on AS. Aim to finish all your notes early, for example by January/February time, then start past papers straight after. The problem with my AS results was my exam technique and not doing basic things like reading my notes because I did not finish them early enough or asking for help. I've learnt to do all of these thing and so far I'm getting A's on mini mocks.