What is your time worth?  I have printed Ilfochromes for about 6
years, so I am no expert. However, the whole slide film/e6
processing/Ilfochrome workflow was engineered to give good
results on Ilfochrome. Ilfochrome chemistry is a lot more
expensive (and hard to find) than c-41 chemistry (assuming you
would do the color negative/scan route). You will have to get
some kind of jig to cut the paper in the proper dimension. The
paper is thicker than film so all of the ANSI-standard
tolerences for holding the film in the holder are off. When you
mess up the development process (not if...but when) you will
have lost the original.  If you have time to trim sheets of
paper in complete darkness, like to make lots of dupe exposures
to make sure you don't lose the photo due to processing error,
can absorb the higher cost of the chemistry, can tolerate focus
issues, and can spend time on your computer correcting fairly
significant color shifts, go for it. If you would rather spend
you time taking pictures rather than ba