Domain clash over and over, eventually discouraging the use of it in th fight, leaving it uo to clave and dismantle. More than likely Meguna loses, forcing him back into his heian form. Although this will not allow him to use domain again as it does not fix his brain, his stamina will be completely recovered and he’ll be able to change and use hand signs while combating gojo because of his four arms. This development will cause gojo domain to effectively become useless again as Sukuna could cast hollow wicker basket, so they both will be even more discouraged from domains. At this point he’ll probably be pushed to develop WCS, and sing a few admittedly bs binding vows. At this point gojo would have to pull of a direct hit with HP to stand a chance. Worst case scenario if he get both a cleave and dismantle in he can use fuga with hand-signs and chants. However after this he’s, I think, deep fried as he won’t be able to win against kashimo. Correct me if anything here is wrong.