Really struggling to cross 20s in DILR. Any tips on how to improve that score significantly?

If ur scores are 27 and above thats pretty good.If ur aim is to nail 3 sets with 90%+ accuracy scan for 2 easy-moderate sets,get done with them in a span of about 20-25 mins and spend the last 15-20 mins on a moderate level set,if by any chance u still have a couple of minutes to spare try solving 1 or maybe 2 questions from a set where each question has its own logic.

Thanks for the tip!

Just dont judge the marks till you solve 30 new sets over the next 3 days and then take a mock. In DILR, the key to cracking sets is confidence and familiarity and the only way to improve both is to be exposed to a higher number or a wide variety of sets. Good Luck!