That's exactly it, yes. The potency gap between Dancing Edge and Armor Crush/Aeolian Edge is larger than the gap between Storm's Eye and Butcher's Block, so less overall damage is lost if the WAR prioritizes the debuff instead of the NIN.
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So we can use our dmg combo instead of using dancing edge,
sometimes the warrior lets his storms eye fall off and doesn't reapply it quickly, this really bothers me as a nin and I am forced to use DE if the warrior sucks at reapplying Storms path,
For the most part storms path/eye forget the name, is on, but every once in a while playing with a warrior I have to use my DE... it's like a punishment for us nins, double dancing edge damage or double the dancing edge debuff timer.