I've been quite concerned with Specialist after I had a panic attack during the final SAC on Monday and reckon I consequently lost 8-9 marks out of 45, completely due to rushing and silly mistakes

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As a result, my previous position as rank 1 is 'in the balance'. I believe I've maintained rank 1 (either top or full mark) for every single SAC up to this, and this SAC was only worth 1/6 of Unit 4 SAC marks so it's 1/10 of total SAC marks, so hopefully it won't happen. However, I'm interested in the worst case scenario - if I fall to say Rank 2?
Some background - the Distance Ed cohort is rather weak cohort of ~65-70 students. Historically only 2-3 students manage 40+ yearly.
2014: 2 students were 40+, a 46 and a 44 (quite a good year), years before that were more like one or two 41 or 42s.
So If I were a rank 2 and full mark the exam (which I believe is a reasonable prospect), what would the potential magnitude of the effect be on my SS?
I.e. if the top 2 exam marks are 120 and 100, and I got the second exam mark, in reality how far could I fall in terms of exam mark?
