How are you doing in your practice tests? what score you are aiming for?
In my opinion, for most guys, a minimum of 100-125 hours of practice (and learning) is key. This does not include 4 hours for each practice test you take. I say learning becaue your concepts should be really really strong and you should be confident that you can do well in a timed environment.
When you practice, record every error you make. Go over them every single time you start your prep. I am sure this will help you make the mos t of the time that is remaining.
I hope this helps
Sincerely
Praet