Ca final costing faculties.

I am a CA FINAL student residing in Surat, Gujarat and am going to appear for exams in MAY,2018 for the first time.
I have not yet taken my costing classes which i am willing to take. But i am very much confused regarding the faculties for costing subjects. Sanjay Aggarwal sir's classes is not available in surat. I have his old lectures ( 2012-13 ) which is already in circulation in the market. So should i rely upon that lectures ? Would it be benefical ? Or else I want to know the reviews about CA Parag Gupta sir ? Is he equally good and provide subject clarity ? If yes , then i can take his fresh batches. So if any one has experienced him , then please please give me the reply for the aforesaid matter so that i can quickly take decision. I would be very much thankful .