Samurai sword .. hands down .. chopping off heads be my hobby.
For long range ... definitely a automatic assault rifle.
However the best would be like that mist swordsman's guy weapons, using a long strong needle like weapon with metal strings to tie them all up, nothing better than rounding them up and then pull with with a truck to a fiery pit I made as a finisher.
Another weapon would be nice, a flamethrower ...