From wow.incgamers.com

Statistics

Talent Improvements

Subtlety Tree

Talent: Master of Deception
Effect: Reduces the chance enemies have to detect you while in Stealth mode.
Statistics: Increasing effectiveness from Rank 1 through Rank 5.

Talent: Master of Subtlety
Effect: Attacks made while stealthed and for 6 seconds after breaking stealth cause additional damage.
Statistics: Rank 1 = +4%, Rank 2 = +7%, Rank 3 = +10%.

Threat Level

This skill causes no amount of Threat.

Uses in PvP

Please feel free to add a bullet list of uses within PvP or editorial if you have more to say. What use is it against other builds, what skills can it be used to counteract or prevent. What skills does it work well in combination with.

Uses in PvE

Please feel free to add a bullet list of uses within PvE or editorial if you have more to say. Which creatures/bosses in particular is it useful against. What skills does it work well in combination with.