The dark side. Pfff. Obi-Wan has proven in his fight with Anakin/Vader that Soresu is more than a match for the dark side. If Vos were to use the dark side he wouldn't stand a chance.
He also proved with Dooku that Soresu sucks. And Vos is proficient in Makashi.
Throw Agen around? If I remember correctly he was had to run to escape (although he had no choice cause he was really still a Jedi).
Vos didn't want to kill Agen. That's the difference.
Luminara not in Kolar's league? Please, stop now. As if she wouldn't be able to block at least one swing from Sidious.
She wouldn't AT ALL. She would get her shit tossed all over the damn office.
I don't think she has any fear. She's pretty much the perfect Jedi.
Perfect enough to die during Order 66?
Wait! Vos survived Order 66. Luminara didn't! That's Ironic, now isn't it?
Maul didn't use Vaapad. And doesn't Vos use Makashi?
Yes, he does. Was trained by Dooku. He was also trained some Vapaad by Mace. More than one move. That's silly. I think his first form was Djem So....
He knows of at least three forms. That would be why he slaughtered a group of Nightsisters and killed a Century old Dark Jedi.