It depends on how much you feel confident about the topics asked in the exam. If you are scoring good in the mocks then well and good, but what coaching institutes do is to guide you in a proper way and remain focused. If you are clear enough about your aim and don't feel like taking coaching then don't go for it as it will frustrate you in the long run and eventually hamper your scores. If you take help from coaching in a positive manner, that is, taking tests, talking to faculties about results and improvement then it certainly is going to help you. 

All the best.

Hello Harsh,

Depend on you.But I would recommend you to join good class because they are expert and will guide you properly.

If you cannot afford or don't have time then join test series of any reputed classes.

Hope i helped you.All the best for future endeavour!!