Nerf war Problem?

I am the captain of a 20 man nerf army that is about to go to war in a week with an even larger army. The enemy has about 70 soldiers and has more nerf blasters then the other armies we fought against. Also we don't get more soldiers intill next month. If we loose we have to join their army but if we win they join us againist a forward ault with the other armies we got to join us against the king of nerf(in the area) and his army. What I need is are some recomendasions for nerf blasters and some good strageties. Any ideas?