While the largest group on that battlefield was fighting to oppress the three weaker Spiritual Emperors, the two strongest were still fighting Minos' team.
However, minutes after the clash began, several people from Minos' group had been forced to withdraw from the battlefield as they had exhausted themselves in helping young Stuart.
With that, the number of 'batteries' in that place had declined to less than 20% of the initial figures, leaving minimal power for Minos to continue fighting.
At the same time, of the several warriors who had been helping to fight those two, more than half had also had to move away from that area, injured or exhausted.
Fighting only those two was not easy since their techniques were speedy and powerful, which required the full attention and strength of each of those Spiritual Kings.