Most Survivability build
Most survivable is Sword/Dagger with 30 in Shadow Arts and Acrobatics and spec into Stealth and Healing. You probably won’t kill anyone 1v1 though. Not quickly anyway.
Umm, I dont know if it’s THE MOST survivable build, but works quite well for me
http://www.guildhead.com/skill-calc#czkMzc9cMnFvoMnFvo9MxGGoRqMkVk8khG7khE7070M7kG270M7kuB70M7owZ70m