I have 3 papers with 6 letters and 2 papers' comments from journal reviewers during journal review process. My NIW (DIY) was approved without rfe. The below are my suggestions. Hopefully,they are helpful to you.
Question:
1. any suggestion for how to prepare another 2 or 3 recommendation letters.
sendd reviewer comments.
2. how to prove my work can separate me from others?
ask your present PI or chairment of your department to write a letter, and state like those: only you can do this extraodinary work. of course you should use different sentences.
also please refer to my previos post to suggest another case similar to yours.
good luck.