Hi there!
I would suggest you first complete as much as you can from the syllabus! That is much more important than just solving papers. In last 30 days you solve as much as test paper you can. In this way you can get good marks and your knowledge won't be limited. Whereas if you just solve last year's paper, your knowledge on that particular topic will be limited!
It is in your hands what to do what to not!
Make good decision.
Good Luck!