The CLAT2020 pattern change was recently announced with total marks being 150 reduced from what was previously 200.
The top 5 National Law Schools NLUs have always taken the best 350–400 ranks from the top students, in GS / unreserved category and many lower rank holders for state domicile, SC, OBC, etc. This inspite of difficult and unpredictable papers for eg. 2011.
In my opinion, the score range to make it to the top 5 will be between 127 and 139, as the playing field has reduced from 200 to 150.
We expect to see heavy competition and tie-breakers will be used possibly for every rank. CLAT uses a 3 system tie breaker and allots the seat according to the student's preference list of NLUs.
If you aim to score minimum 127 in each mock test, that works out to 85% paper being correctly answered.
Try to attempt different CLAT mocktests set by different authors so you get plenty of practice.
Now that you have a goal set, get going
All the best!