A fusion between Gojo and Sukuna have to fight a composite between every single other character in the verse except Takaba, who’d win?

Everyone has the most optimal stats, meaning the composite would have Todo’s BIQ if you consider him to have the highest BIQ. The composite has access to every single CT, every single DE, every single barrier technique and every single buff that didn’t belong to either Sukuna or Gojo (both Heavenly Restrictions, Cursed Energy Traits, Rika’s infinite CE in 0 and whatever else you can conceivably think of).