Yeah, could be but i dont think It is only for that.
If ulti is that powerfull and is not WW and Sasaki level , no way these two Will fight less than a stronger SH in my opinion or a Law or kid or Killer.
But this is assuming the straw hats have to fight people of the same level.
Like isn't it more likely that the rules of shonen mean All the straw hats fight people stronger than them.
I still think Nami and Usopp will have another round and Nami and Usopp will win. I mean Ulti still hates Nami for the luff will be pirate king thing so she's not just going to let them go.
I'm very sure they will chase nami and usopp until they get a better plan and in the end Nami and Usopp will win.
And same for Franky and Sasaki. Even if Sasaki wins one round or something, I'm sure in the end Frank will win
You are of the mind that this war is near ending and that people will have easy wins since they are fighting people of relative caliber to themselves. nahhh.
This shit has like 40-50 chapters left to go and all the straw hats will go above and beyond and win