He preferred to make others believe his limit was just a bit above the crowned prince using the second step of Bloodlust, which would be the early stage of the Arch rank, but unlike him, he maintained his rationality and that was the "reason" of his victory over Terry, is the story he fabricated for the spectators to believe.
Since he didn't know if the bastard behind the pirates and the Skelefiends was watching the tournament, Core Synchrony is his trump card and its full power should naturally be only revealed to two type of people, first those he trusted enough like the girls and his friends, second those who couldn't talk about it, in other words the dead.
But he had no need to be in a tight spot even without Core Synchrony, that's why he picked all his team across the maze after all.
"Well, since you are team fighting, I don't have to feel bad of bombarding you in a 12v5 battle, right", said Daimon with a smirk.