This is sick. Tulak was a legend with the lightsaber for a reason. If he can't handle this battle, he should never have survived as he did, in a time of many great Sith lightsaber duellists who were no doubt out for his head. He -was- a Sith lord, you know. He had a position of power among Sith for a reason.
If Kreia were to be believed, Tulak can take Mace and Hoth, especially since neither of them faced enemies quite as powerful as the Ancient Sith from the height of the Sith Empire. However, we don't know enough about the Ancient Sith to give Tulak the benefit of the doubt. I'm leaning that way though.