My QA section has been consistent in my past few mocks. What im struggling with is DILR fluctuation where i am able to only do 1.5 sets sometimes and other times im able to easily do 2-2.5 sets. how do i select sets. And Main issue is VARC section where my score sometimes even goes down to single digits. Too stressed considering how close CAT is now

A steady QA score is a great base, so you are closer than it feels. For DILR, spend the first four to five minutes scanning all the sets and pick the two that look the most familiar in structure, not the ones with the shortest text. If a set gives you nothing after five minutes, leave it and move on. After each mock, redo the sets you skipped without a timer; that shows whether the problem was selection or solving. For VARC, two RC passages a day plus a quick review of every wrong option usually lifts the floor within a few weeks. I keep a small error log for this (I use Sikhami for my notes), and it makes the patterns easy to see. You have time to fix this, so keep going.