1)
What is the meaning of "v'Niplah"?
1.
Radak: This is like (Yirmeyah 37:13) "El ha'Kasdim Atah Nofel" (i.e. let us join with them).
2)
Why did they say three times "va'Masnu"?
1.
Malbim: If we go to the city or stay here, surely we will die. If we go to Aram, people we will live, and perhaps we will die. We can gain, but we cannot lose!