As of the Land of Waves arc, Sasuke took down multiple of Zabuza's water clones
Each of those clones having a tenth of Zabuza's strength
So Sasuke>10% Zabuza
Rock Lee casually blocked Sasuke's kick
Which means
Rock Lee>Sasuke>10% Zabuza
With the first gate, Rock Lee is 5x stronger than his base, and with the reverse lotus he'd be dozens of times stronger (24x for the sake of the lowball)
Rock Lee used the reverse lotus against Gaara
Which means when Rock Lee fought Gaara, he used a strength surpassing Zabuza's strength by more than 2.4 times (btw this is consistent as Kakashi activates his sharingan when Lee opened his 4th gate)
Sasuke is stated to be Gaara's strongest opponent
So the Sasuke that fought Gaara would be over 24x stronger than Base LoW Sasuke, which means over 2.4x stronger than Zabuza
Naruto's rasengan did more damage than Sasuke's chidori, which seemed to give Sasuke a bit of an inferiority complex, so Post-Tsunade arc Naruto would be at least 2.4x stronger than Zabuza
It's stated that Choji is by far the strongest in the Sasuke Recovery Team
Which means SRA Choji is at least 2.4x stronger than Zabuza
Base Jirobo overpowered Choji
Which means Base Jirobo is at least 2.4x stronger than Zabuza
With the 2nd stage of the curse mark, Jirobo is 10x stronger
Which would make him at least 24x stronger than Zabuza
It's also stated that Jirobo is the weakest of the sound 4
So if he is 24x stronger than Zabuza, the rest are also at least 24x stronger than Zabuza
The main counter-argument would be Kidomaru thinking they can't take on Kakashi, but we have seen Kakashi train during part 1
