I haven't read any of the replies, but here's my advice:
Don't go 7 A levels. 5 at most, I would say.
Out of religious studies and history, go for history.
Philosophy is respected, by not necessary.
Same goes for government and politics.
Psychology, biology and physics aren't very related.
English literature > English lang. and lit. > English language.
Economics would be useful.
Mathematics would be useful.
In my opinion, you should take:
* - optional.
In fact, as a 5th I would actually recommend further maths AS, but I think you'd flat at refuse to do that!
Maths A level is not hard. The vast majority of people who complain about it are people who got As/A*s at GCSEs with next to no work, and lets face it, that hardly shows any ability in maths.
There is little work to do, and you can just do past papers and reproduce solutions from memory in the exams, if you're that bad at it.
If you really struggle with maths, you won't be able to handle the economics element of the course, so it's not for you.