I had an entire thing typed up, but since I took too long to submit, I got a 404. Thanks, makerbot.
This is a continuation of the Kuuga helmet I posted earlier-made it for my cosplay. It's most of the major pieces you'd need for the suit, minus the chest armor (which isn't a good idea to print in the first place. Just use EVA foam for that). Not everything is scaled, and you'll need to slice the scythes into multiple parts via meshmixer or something like that to print them.
There's also a blend file with the raw wireframes if you want to play with that (filename: A Mess); they were all speedmodeled, so there are probably errors. Feel free to use it for pepakura and whatnot.
Update, 1/26/18: Added legscythe modified. It's more scaled to a proportional human body, and should sit flush with your leg without scaling if your calf is around 31 cm in circumference. Legscythe (regular) probably won't be flush with your leg unless you're ridiculously beefy.
Printed in flexible PLA (shoulderpads) and TPU (everything else). Finished via lots of bondo (shoulderpads and other low-flex areas) and kinda ridiculous amounts of modge podge (did you know if you cake enough of it on and have 200 grit sandpaper you can sand modge podge? wild).
These are all attached to my body via magnets. I have a couple pieces of knitted elastic sitting underneath the suit which have neodymium magnets glued onto them. I use both smaller ones (the 10-pack from Harbor Freight, maybe 5/16 in/8mm in diameter) and larger ones (.5 in/13mm diameter). 2 'sets' (4 magnets total per scythe) work fairly well for the arms, but will occasionally still fall off. Haven't tried the legs yet.
crying 2 and weeks before otakon. don't do ultimate form as a first suit. learn from my mistakes.
Otherwise: Blender, basic wireframe and a subdivision surface modifier with edge creases. These are all taken from the new figuart; I used it as reference for the basic shapes and dimensions via calipers. If you want to screw around with the wireframes, they're all in the .blend file.