from ur message i guess u are more concentrating on 2nd group. first my sincere advice to u, start preparing seriously for both the groups.
Secondly for second group, since u have taken coaching at spellbound its not a big problem for preparation.
But i would suggest for costing to do compilation every problem atleast two times along with sir's material. Also use study material on initial topics..developments in costing. Regarding standard costing if u find time just work out one day on sarvana prasad's book, enough. Concentrate on Q.T ..Vinod reddy's material is enough....u need not see any other book including compilation. Lastly theory...dont neglect that...read along with the topic.
Indirect Taxes....sir's book is good at subject but i feel it difficult during the times of exam...so what i did is just having the concept in mind by reading the book and later i took bangar's book for preparation... if u are new syllabus student...concentrate on case laws...read every case law of 2009 year in supplementary material...and less imp to customs....better follow the same strategy which i did..
for direct taxes...its time consuming subject...u cannot leave even small topics also....of course u can do on ur judgement only small topics...ur book is enough...but answer under simulated exam conditions atleast two papers....keep aside every day two hours for that....
for mics....the book is more than enough....analyse each topic in every chapter...and then while reading the topic try to frame a question to that topic...so that u can answer any question...in exam.
ALL THE BEST.....