So, I may be completely wrong here but I think we might have a hint on how this battle might end with this chapter. Since it was Megumi's soul and not Sukuna's that adapted to limitless, and since Sukuna has experienced the damage of limitless first-hand, I think the winning move would be for Gojo to get rid of Mahoraga and then be in a position where he is sure to hit Sukuna with Limitless. Since Sukuna himself didn't adapt to limitless, but rather Megumi's soul did, he would have to give Megumi temporary control over his body to avoid disintegrating, thinking that he could get it back very quickly afterwards.
It would be poetic if the Sukuna's Trump card against Gojo ended up being the very thing that enabled his defeat.
Or I might be completely wrong... but whatever, just a thought that crossed my mind since both parties seem to be nearing their limits.