Well, I'd actually have to say that the most effective jutsu for him to posess is Edo Tensei. I mean, having the unbound Edo Tensei for himself would be badass.
or if he had earth techniques..he could like rig the area where he is fighting and then make the ground go soo below. then since their is no way to run away, he can go crazy since his quite fast n doesnt need to perform hand seals to attack like ordinary ninja