Whether to migrate form old to new course

Dear all, I am paras. I am in CA final. I got failed in nov 17 exams and it was my 3rd attempt and i haven't clear any group or particular subject. I am planning to give 2nd group in may 18. Syllabus of DT and IDT are now same in both new and old courses are same. My idt coaching are almost complete and i am planning to do DT by myself at home and for the rest paper like cost and elective paper(internation taxation prefer) i am planning to go for coaching. I am. In dilemma whether should i go for new course because one of main reason to switch over is ISCA(nhi smjh aati). Please guide me with my decision. Should i switch over or go for old course for may 18 for 2nd group