The BITSAT score you need for securing a decent branch in BITS Goa changes each year due to a variety of factors. The recent cut-off BITSAT scores for various courses at the BITS Pilani Goa campus is given below.
B.E Chemical | 250 |
B.E Mechanical | 280 |
B.E Electrical and Electronics | 310 |
B.E Computer Science | 352 |
B.E Electronics and Communication | 322 |
B.E Electronics and Instrumentation | 294 |
M.Sc Biological Sciences | 250 |
M.Sc Chemistry | 256 |
M.Sc Physics | 274 |
M.Sc Mathematics | 276 |
M.Sc Economics | 295 |
Now it is always advisable to prepare for JEE (Advanced) more than BITSAT. This does not mean the Goa campus of BITS Pilani is bad or BITSAT is really easy. Many students actually keep BITSAT as a backup plan in case they fail to get IITs and I think it is a good strategy. Any day you should aim for IITs. But around 4-6 months before the exam you should know your potential and seriously consider whether you should give BITSAT or not.
As for the exam difficulty, it is often considered that BITSAT has a lower difficulty level than JEE (Mains). While that may be true but the time constraint, accuracy, and the competition from students should also be taken into account. You should take at least 10 practice BITSAT tests to nail your time management skills.
Finally, I would suggest that get a good grasp of mathematics and you can certainly excel at any entrance exam.