Not really. I've came within 20 dps of every GB parse prepatch with it only on in opener and could consistently hit those #s whether RNG was in my favor or not.
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Either way, ss's effect on cast times will be kinda nice.
Ran Alex floor 1. Parsed at 1003 on the first trash pull. The dragoons piercing debuff must really help out the machinist considering I barely pull 900 on a dummy
http://i.imgur.com/JMhJ4cV.png
987 A1 no dragoon
GB on at all times, unless you need to burn mobs down...and your DET is outstanding.
Otherwise? Rotations, rotations, rotations.
If you're stance dancing after 3.01, you're wasting a DPS slot.