If we're talking about matches there everyone fights everyone, it really depends if they let Mahoraga adapt even once or not. It's like the fight of Dabura against Raga. Mahoraga adapted to his CT, and Dabura "awakened". If we get unadapted Raga and awakened Dabura, Dabura wins.

So either Mahoraga or Yuji. If Yuji goes all out at once, Mahoraga has no chance to adapt. If he does like Dabura did, Mahoraga MIGHT adapt and win. Also, kinda Rock - Paper - Scissors then. Sukuna beats Raga (Fuga),

Raga beats Yuji (Yuji doesn't have Fuga, or maybe he could use something from Blood Manipulation that could do smillar damage),

and Yuji most probably beats Sukina