Ya zuggles we gotta team up sometime. I am a little curious about your set up though. Scorpion sting seems a little counterproductive with backlash, since stunned mobs won't attack you. If you are doing the alternating approach (quickening/LTK), I would think overawe would fit in better than backlash as you could activate overawe while using the LTKs.
I agree somewhat that this seems dis-harmonious. However in 1.08 with tons of mobs I find that Backlash still procs alot especially when you first dash in to the middle of a group and when also after my spirit is spent and I'm generating back up with quickening. So essentially mobs go from stunned to un-stunned, and during that time Backlash sustains a bit.
To your point, I just like this backash build solo as a personal preference. Partly b/c I frankly hate spamming mantras instead of kicks. I do switch to Overawe plenty of times, either when it falls to me in a monk group and/or of course when playing with any other character type. Just to good to not use. In that case I do fill my spirit, then pop Overawe and FitL Before unloading kicks in sequence. Personally I just find this a bit less Tanky when soloing high MP 7-9.
Reading back through this guide I'm now thinking of doing my exact build but with Ytar instead. Dropping lightning right on the mass of mobs, gaining even more cyclone proc, and see how Backlash works without any stun effect.