Here, I think it falls more to the question of, what are the circumstances? Oscar was a monster, an aberration, and not because of his power, but because of his skill, I can't remember the exact number, but his skill as a human must have been between 60 or 70, an absurd amount, Michael and Alice are the only ones who might have more skill, but, until we know for sure, Oscar is basically the greatest or one of the most skilled
Oscar beat his monster without preparation? Yes, but we must remember that although it was a monster, it wasn't that powerful, considering Oscar's own abilities, dangerous but not powerful. Michael beat his monster, true, but two things to note, he had time to prepare, and even though he won, he would have died if it hadn't been for the 2nd Apostle
And being honest, level 1 mc could be killed by them or kill them, the odds are 50/50, because they have a lot of training, but without weapons and using only their hands, The mc would end up winning, either by his bone thorns or his poison, it would be basically this here:
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