I think you meet at least 4 requirements for EB1-a.
Your chance is 70-80%. It is worth to try.
NIW的推薦信can beused to 申請EB-A. As far as I am concerned, it has no problem. But remember the petition letter format for EB1-a is different from NIW.
In Eb1-a, you need to focus on the demonstration you are recognized as an expert nationaly and internationally in the field of your effort
Just for reference!
yjy_wang@yahoo.com