Hey Cipriano,
I would go with either one, but personally like rivercane. Make sure it is only around 1/2 inch in diameter so that it flexes in flight. One way to "spine" a dart is to put the tip on the ground and push down on the top, until it bends. Do this while the dart is on a bathroom scale and the weight that it bends at should be around 4-6 pounds. hope this helps.
Jon