Original post by Octopus_GardenHmm. I have to say, the more German and French I learn, the more a degree seems essential for me to become fluent. I could have taught myself GCSE-level reading, writing (and listening if we're talking about German) by myself. At the end of the GCSE German course, I felt that if the A-level didn't run, I would be able to continue by myself at a similar level of progress, given enough self-discipline.
Now I've completed A-level, that idea I had seems completely and totally delusional! Admittedly, that may reflect my abysmal lack of language ability more than anything else, rather than the universal difficulty of self-teaching languages from the CERF for Languages level B1 onwards...
That said, if I was in your place, I would keep the languages, drop English Literature and History, and pick your two favourite Sciences in their place. I do not advise A-level Maths until you have covered the whole of GCSE Higher and feel totally happy with it. Doing three A-levels in subjects you've not really done since 2011 while trying to get to grips with C1 without a confident and complete grasp of higher is a recipe for disaster. Sorry.
Doing two languages, two sciences and doing GCSE Maths in your spare time sounds more achievable. You would have more options open to you. You could go down the language degree route, or the scientific one with a year abroad.
At the end of AS, you will have a better idea of which way you're leaning, and if necessary, you could take A-level Maths as an express/fast-track course, having done loads of work during the holidays after the AS and GCSE exams.
I, personally, would never take English Literature or History because I'm well aware it would doom me to a U*. Doing my GCSE coursework on the "soliloquies of Macbeth", etc was hard enough!
Remember, dual and triple linguists get out of the literature modules, if you haven't already read that. It's part of the reason I took up French!
*In fact, I took AS Classical Civilisation, which should have been renamed English Literature translated from the Greek. The literature component came as a terrible shock to me and I did end up with a U.