urgh... i just wrote a whole reply to you, was about to send it, then my computer decided it hated me and then locked up! evil much? Let's try it again, in a slightly grumpier tone...
I did my unit 4 paper in January and it was World Sociology, not Religion, so i am not sure what content you are supposed to have. But examiners like analysis - the AO2 marks. But don't forget description and knowledge as well. If you use a theory, explain what that theory is (e.g. functionalism is a macro, structural, consensus theory...) using buzz words - the examiner will underline these as he/she marks, the more underlining, the better for you. You need to criticise more, and compare theories/methods/etc... with others. Use your own opinions on theories, but NEVER use the word 'I' - bad, bad word. Make it flow, it's just part of the essay.
The 8 mark question is basically the same as the 8 marker in the AS paper with the ID: and EX:. The 12 marker is like a mini essay and the 40 marker is a normal essay (like the two 20 markers from the AS paper put together). Use up-to-date examples, remember a few key theories and the names and dates of the people who came up with them. to get an A on this paper you only need 42/60, which is quite do-able.
For the synoptic paper, i don't really know. I'm guessing it is the same thing. My (former)class hasn't even finished the topic yet, so we're supposedly going in for extra classes, despite school being officially finished. What makes me feel better about it, personally, is due to the fact that i got an A overall at AS and and A in Unit 4 and in my coursework, in terms of UMS marks, i only need an E in this paper to get an A overall. All questions in this paper are synoptic, whether it be methods, theories or modules, but you should still mix it up, e.g. in the theories question, say how feminists argue that traditional marxism ignores gender differences, e.g. Fuller vs Sewell - afro-caribbean girls more likely to get on in education and not turn to crime than the afro-caribbean boys who are. Stuff like that...