During my exam times, I used to follow bangar. After clearing CA final also, I keep d semi-annually published book with me to remain updated.
I have not yet received the copy relevant for Nov 15. As far as your confusion whether you should follow any other reference book along with bangar, my suggestion would be **NO.**
Bangar contains all caselaws/amendments etc relevant for the exam.
For IDT, I would suggest you to read the following:
1) Bangar (contains all caselaws/amendments etc) - Nov edition book to be purchased.
2) Practice manual
4) Only Back questions from updated study material by ICAI.
5) Case Laws published by ICAI for Nov 15 exam
6) Case Laws published by Paduka for Nov 15 exam - Case laws are given in summary - Relevant for exam time revision.