Wait, hold on. AngeliusMefyrx, when you say "backstab" are you referring to the Scoundrel Skill BackLASH, formerly known as Vault, which teleports the Rogue behind the target and backstabs them?

Because I have not been talking about the Skill, called BackLASH (requires Scoundrel 1). I have been talking about the Talent, called Back-Stabber (no Requirements), which lets basic, normal attacks do critical hits from behind.

Cripes. Confusions like this are one reason why I try to encourage people to use common terminology as used in the game.