Gladiator v.s Viking?

Gladiators would not have used most of the weapons you refer to historically. There were many types that had different weapons and each one was trained only in those weapons. Also, vikings were not mercenaries per say. Most served under a king and were regular soldiers. The Viking was trained to fight in a shield line, not one on one. In a one v one confrontation the gladiator still likely would've lost due to the fact that many vikings drugged themselves when going into combat making them extremely fierce.