Antminer, Cointerra etc and all you had to do was wait for KNC to fall on their faces and/or buy too many Jupiter modules to fit in their data center.
You are buying their crumbs.
You are getting 18 Jupiter Modules (166gh each) are they new Modules? If so how much more do you expect to overclock out of them?
2nd batch (November) were the same chips no? So isn't 166gh per chip the top end already?
I could be wrong but you may want to double check your math.
Extrapolating from my November Jupiter, which uses 820W at wall using Platinum PSU to provide 760GH/s (190GH/s per board overclocked to 1000MHz) - so 18 boards = 3420GH/s @ 3690W.
Personally I would go with 4 x 1000W PSUs, but 3 x 1250W should be possible if you like running close to the wind.