[1.2.376] More Warrior Rebalance. Remixed music.

The translated strings seems to indicate that yes.

So 20% chance to inflict darkness for 15 seconds on bosses, and a 30 second cooldown? Seems pretty good, especially if you have multiple heroes/Threaten already.

Now they just need to make MM's Blind work on bosses too. And make Mage Slow activate chance attack as well =]

OH okay.. I see where you're getting it from. It should be:
Normal Mobs: 20 MP(unchanged so far), 2 Combo Orbs required, 1000% damage, 6 target, 90% Blind Rate(unchanged so far), -20% accuracy for 30 seconds, 30 sec cooldown.

Bosses: 20 MP(unchanged so far), 2 Combo Orbs required, 1000% damage, 6 target, 90% Blind Rate(unchanged so far), -20% accuracy for 15 seconds, 30 sec cooldown.