FFXI had a better representation of it, because Samurai had evasive and tanky skills to parry attacks, was able to do high damage and they yet could use a bow to deal ranged DPS, plus having skills for it.

I think it'll be hard to implement Samurai here. It suits better as a melee DPS, but doing that you'll be ignoring the archery aspect of Samurais (Archers on a horse, using the Katana as last resort in close combat).