Hey I like that quote in your sig 
As far as powers go, the build looks great. You've got pretty much everything you need. I'm not too keen on IO's, so I won't comment on the actual slotting.
In my experience of playing spines/nin, it's pretty squishy, so you definitely want to get as many +HP accolades as you can. When you're not in your tier 9, people will hit you with ease, so be ready to hiber/phase. Also, I may be reading it wrong, but it looks like you don't have enough KB protection. Need to be in the high 40's (with acro), and you seem to be in the mid 30's.
Overall Nin is likely no longer a top-tier set. With defensive sets, you may be better off with EA. Overload is arguably the best tier 9 in PvP, and it makes you pretty much unkillable. Plus you don't have a KB protection hole.
So, I've decided that I want to roll a stalker for PvP. I've played just about every other AT in zones and thought it would be a refreshing change of pace to try out a stalker. After playing around in mids I came up with a Spine/Nin build that I wanted the PvP Forum community to critique because - as alluded to above - I'm new to stalkers.
Also - I'm open to changes in powers, I understand that Nin might not be the best secondary; and as such, would welcome any advice as to other secondaries to consider.
Below is what I came up with for Spine/Nin
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