Returning player, need some suggestions!
I havent leveled a thief in ages but I would probably try to get at least 3 points in Acrobatics for more dodges and swiftness on dodge and I would get 2 points in Deadly Arts to get Mug trait for more dmg and survival. And 2 points in Trickery to get the trait Thrill of the crime. If you feel you dont need the extra dodges just focus on Critical Strikes for more dmg instead of acrobatic.
For dungeon build on lvl 80. I recommend you to read this guide. Even if you’re leveling and arent 80 yet its still worth reading
Schutt (Schett) The Shadows [TA]
Team Aggression
Retired Red Guard
Team Aggression
Retired Red Guard
^ If you want to read about the build only, not the entire class and not only about PvE, then this will help.