Hey.

As far marks are concerned ,

Total marks of Jee-Advanced changes every year.

So marks can't be a criteria.

Till 2016 65–70% marks in Advanced were termed as good to get Core Branches.

But last year it again changed. & 50% marks could give rank of 12k that would fetch you nothing.

I would request you to study and give your best for exam without thinking about result.

You'll get the thing that will be best for you.