1)
Why does it say "va'Yomer El Avadav"?
1.
Malbim: He was confident that it is a simple matter to conquer the city. He and the kings with him did not go, just he left it to his servants.
2)
What should they put against the city?
1.
Rashi: The Kelim used to besiege a city.
2.
Radak: [Prepare] the Kelim used to fight against a city.
3)
What is the meaning of "va'Yasimu Al ha'Ir"?
1.
Radak: They prepared the Kelim to fight against the city. They did not actually use them, for before they could, Sarei ha'Medinos came based on the Navi's word.
2.
Targum Yonasan: They besieged the city. Radak - the rest of the army was still in Sukos when Sarei ha'Medinos went out.