I'll just quickly debunk the things you told Conq since we're going off of that comment:
4 arms form - isn't a buff for Sukuna by his own admission. He himself stated he can switch to it at any time but his current form is more suitable for fighting sorcerers.
Yorozu's gift - if it were useful against Infinity, he would surely have used it to kill off Gojo, no? That would still leave him with another trump card in the form of Open, no?
Open - same argument as for Yorozu's gift.
And people keep saying he has his own CT AND Open. On what basis can we talk about two different techniques when it is likelier that it is one and the same?
While using Open he says to Jogo "I will not cheat by revealing my technique". At most, that means Open is a subset of his CT, not a separate CT entirely.
The only thing in his arsenal that could bypass infinity was:
Domain Amplification - can't use it now
Domain Expansion - can't use it now
Mahoraga - dead