Here is how to beat 6 Paths Naruto

1. Blitz him down round 1. He can't do anything if he is dead
2. If in Round 2, don't let yourself be interrupted, let the naruto waste its mystery so it gains tiny amount of leech, bait the dodge, then blitz.

If you can't do either of the above, you're probably not going to beat them regardless of power.

I can't agree with this. Edo Itachi was meant to counter the kakuzu meta, but instead it joined the meta, which is why Beheading Sword Kakashi became the counter to shut down kakuzu.