-scoundrel:
90% of the skills are based on using daggers. There are no different choices for weapons if you play this build. One handed swords and any other weapon type is simply discouraged.
The backstab mechanic really isnt that exciting. Just stand behind the target and crit. No situational skills, no interesting mechanics, just physical damage from behind.

If you want to make a hybrid character, you can combine it with warfare skills. But then you will realize you're just playing a warrior with two daggers and you won't bother to backstab or use scoundrel skills, because its simply better to stun and aoe eveything.