Abbasali- If your attempted questions in ama were accurate no need to worry. One best friend of mine got 56 by doing only 78 marks in Nov 16 which was also another lengthy paper.
IN ISCA,DT,IDT I hav attempted at least 40 to 50 marks correct ,20 to 30 part correct and rest 20 to 30 uncorrect....hoping for liberal checking.....rest is depend on our ultimate boss icai.
In AMA the moment they gave question paper I knew it would be a real test of speed, so I focussed on answering 90 marks as accurately as possible as per Sanjay Agarwal Sir's advice...I did his old video classes at home for this subject.