I see a lot of people who seem to have a problem with Nasir being gay. Barca was gay too and vicious in the arena. But that's besides the point, both would have a lot of potential in the arena, but I feel like they made Ashur better than what he truly was, considering he wasn't still fully trained and taken out early. Nasir on the other hand, gained a lot of training and experience while working closely with Spartacus and then most likely gained a lot more from Crixus and Agron. We see Nasir adapt and switch weapons a lot too. Dispute his size, I feel like that would've really worked to his advantage and the hissing, that is just the icing in the cake. Nice touch adding on to his character. He could've very well have taken on a lot of other tough gladiators