Ca final may 2013 - 1 group or 2 groups

Dear friends and mentors,

I had planned to join classes by nov end 2012 for all the 8 subjects of final and to give my best in may 2013 exams.

But a few of my friends advised me against writing 2 groups as time(dec to april, 5 months) wouldnt suffice as the coaching itself will get over only by march.. i am confused and not able to decide..

So i look up to you to advise me on this.. also whether coaching is required for all the eight subs or self study is possible for some subs given the time I have till exams..

regards,Vidhu