Master Tactician

From wow.incgamers.com

Talent: Master Tactician
Effect: Your successful ranged attacks have a 6% chance to increase your critical strike chance with all attacks by a % for 8 sec.
Statistics: Rank 1 = 2%, Rank 2 = 4%, Rank 3 = 6%, Rank 4 = 8%, Rank 5 = 10%.