Wanted to do this for ages now,my take on a 41st millenium Cabal. The idea is that the cabal themselves after ten thousand years have begun to take a more direct approach to fighting chaos and have used their collective alien sciences to create VAT grown disposeable armies of organisms that are immue to chaos and can fight them. This is a "Shelf" army not a "gaming" army but if they were in the game id imagine them to be psychic blanks and be strong as terminators but very slow cumbersome with low intelligence.
They were made from really old casts of a crappy sculpt from about 12 years ago which I then covered in hot glue and added the eyes. Based them in a pink colour then put a dark blue wash over the top, drybrushed them in a pale blue-grey, painted the eyes black then glossed the f**k out of them. Simple but I think they are effective.
I plan to add an HQ and some vehicles next, but I wanted to get the basic infantry out of the way first before the "fun" stuff.