3. Должен прокать только с той руки где экипирован. http://ru.wowhead.com/item=77188#english-comments
"What does it proc of?
It does not proc of special abilities done with the other equipped weapon (e.g. Shiv for Rogues).
It does not proc of Main Gauche (Combat Rogue Mastery).
It does not proc of auto-attacks of the other equipped weapon (off-hand in the case of rogues).
It only procs of its own auto-attacks and special abilities done with this weapon.
Information about the proc
The proc chance is estimated at 6.5%.
The proc chance is 33% for the Shadow/Fire/Frost variations.
The proc can crit at 150% damage.
The Fire and Frost variatons scale with Enhancement Shaman's mastery.
All procs scale with Combat Rogue's Bandit's Guile."
очки одень и прочитай