I'd have put the weakling trio together against Ulti/P1, I believe in 3 vs 2, with Monster Chopper lasting 30 minutes, Zeus and a good strategy they would have had a chance of winning. If not enough, one or two weaker scabbards could help too. Anything but Big Mom doing 90% of the job which was extremely anticlimatic.
Carro actually beat Peros with the help of someone, maybe Brook.