Reluctantly I say Mace and Exar. Ulic just couldn't contend with either of them as long as Mace or Exar could hold off Yoda. Then you have either a worn out Mace or Exar and the other is a little fatigued against a tired Yoda. Yoda, while better than Mace or Exar, is not better by leagues. He would go down after a tough fight. It is actually a tough fight because Mace uses Vaapad and Exar has a double bladed saber, so, the styles wouldn't mesh at all. Still, Mace and Exar hold a tough victory.
Yoda can't beat any of his two opponents easily. If Exar fight Ulic as he wants to show superiority over his apprentice (and he doesn't want to fight a little green guy, he thinks he might suck) and then beats him. Mace fights Yoda long enough for Exar to come and help kill our little green friend 🙁