Irrespective of which mock test you give, one thing that for sure would help you is doing an RCA ( Root Cause Analysis ). This has helped me a lot.
Refer to attached image.
While answering the question, wherever i was a bit doubtful i use to write like what are the chances of being right or wrong and while reviewing it, i use to update the actual status whether i was correct or did i do a silly mistake of overlooking keywords like 'NOT.
You can create your own set of legend, this is just an example.
Like when i did first time pm-simulator, i realized that i marked 73 questions out of 200 and i only had 11 minutes t review and i learnt my lesson that i should be conservative with marking.
Also whatsoever i have marked or answered as wrong, i use to double check the reasoning behind it.
I would say, before you jump on to 3rd mock test, review each and every question ( including the right ones ) on first two mock test and think about what was your thought process vs what the selected answer indicates. This would improve your thought process & help you in clearing your concepts.
-Neeraj