For leveling, Combat spec with dual swords. Why?
-Swords are easily found while leveling as quest/dungeon rewards. Thrash Blade is an easy to get Pre-Raid BiS. (Not Dal’rend’s, due to some strange changes in how often Thrash Blade procs)
-Nice and easy rotation (spam SS+Evis when ready).
-Blade Flurry is almost a must in solo PvE.
-With minimal respeccing it’s also one of the best endgame raiding specs.
Why use daggers (Assasination)? PVP basically. And it’s not fun PVE-ing with for me. Gouging, getting behind enemies, waiting for energy, backstabbing, repeat. It’s slower, can’t seem to deal with multiple mobs as well as combat spec.
Dagger Rogues don’t show up in endgame raiding before BWL, where a backstab rogue can work pretty well on Vael.