Sarkozy, by saying "very few journal articles" how many do you mean? If you think you don't have enough credentials for EB2 then don't even think about EB1. I have seen somebody with just one first author and one third author paper getting EB2-NIW (Those articles were in journals with 2 or 3 impact factors). You probably know that EB2-NIW can be self-petitioned too as is EB1A. Here is my suggestion :- if you think your publications are not enough for EB2-NIW, then write to journals to volunteer as a reviewer. Big journals won't give you a chance, but you can go with smaller journals. Trust me it works and in 2/3 months you will have reviewed at least 4/5 manuskripts. It will help a lot in your case.
Hope that helps