Kabuto at his best can just about counter anything Nagato has.
And Kabuto is near impossible to kill with shedding, liquifying, and Uzumaki regeneration. Let's not forget that he's EXTREMELY fast because he dodged an Amaterasu Susanoo arrow like it was nothing. I think Kabuto beats Nagato because once Nagato's abilities are discovered, skilled ninja can pick off the paths.
I don't know about Itachi vs Jiraiya. If Itachi doesn't use Izanagi, Susanoo, or Yata/Totsuka, Jiraiya could probably out class him.
And Kabuto is near impossible to kill with shedding, liquifying, and Uzumaki regeneration. Let's not forget that he's EXTREMELY fast because he dodged an Amaterasu Susanoo arrow like it was nothing. I think Kabuto beats Nagato because once Nagato's abilities are discovered, skilled ninja can pick off the paths.
I don't know about Itachi vs Jiraiya. If Itachi doesn't use Izanagi, Susanoo, or Yata/Totsuka, Jiraiya could probably out class him.