The only think I'd suggest is to try to keep everything sooth.
A lot of smooth surfaces to allow the light to bend around it giving it the illusion of invisibility (not for real...).
Just keep everything smooth. Too many hard edges and angles and you'd end up with a weird-looking Mk. VI Mjolnir, not SPI.
I am actually really excited about this. I trust that you'll actually go on your word and make this armor. Most people say they will and usually don't. And I know you've got alot of experience making Stormtrooper armor, so I know it's going to be top-of-the-line work.
I can't wait to see this thing get started and I wish you the best of luck!