is solving past/other school’s papers really all that necessary?

Don’t come at me for this, but i’m genuinely curious. Does it make a difference? I have boards exactly in 9 days and i’m lost about this specifically. I’ve almost completed the portion and done revision too. But there are way too many papers i have access to and i’m overwhelmed each time i look at them or check my workbooks. Those of you who solve papers, what is your process?