kakazu low-mid diff(cause of katsuyu)
also people think a healthy tsunade cant beat kakazu but last i checked she uses raiton which he can use to mess with kakazu's nervous system as kakazu's earth spear is weak against lightning. if she combines raiton and body pathway derangement then kakazu would die rather quickly if tsunade hit him even once. also he doesn't have a jutsu to kill her with adding katsuyu to a fight between tsunade and kakazu is making tsunade too OP
healthy tsunade > kakazu (mid diff at the most)