Hello, my mock scores are stuck from at around mid 70s to 85. Could anyone help me with any piece of advice on how to get above this range? In analysis of mocks, I'm almost always cursing myself for not attempting the questions that I very much could do or making unforced errors. Any piece of genuine advice is welcome.

Hi
Try to compare your past 3 - 4 mocks and identify the areas where you have committed more mistakes and then try to pay more attention to those areas . If you are not attempting the questions which you should attempt then one of the issue is in selection of question .
In LRDI try to read all given sets within 5 mins and then start with your strengths and in quants as well try to skim the entire paper in the first 20 mins and attempt all the sitters in the first round nd then go for medium to tough level questions . Try not to make silly mistakes , even if you spend a minute or two extra in a particular question it is fine because one mistake costs you 4 marks which is very heavy . Try to be more accurate as that is the key .