what weapon should he use?

1.scythe(they are powerful like hidan showed in the akatsuki ark)

2.some type of dagger with magic infused into the blade

3.a shuriken the can change into 20x more shuriken and as you train these also get more powerful(also goes in turn with the scythe)

4.a dumbass rusty kunai that also levels up but not as well cause its,you know,rusty.