Things are beginning to shape up a bit here. You can see I haven't completed all the shading yet, it's mostly just the faces and some very basic light and shadow for the clothes, and even that isn't finished yet. But it's coming along rather nicely. At this point I've invested a little over 8 hours into this project.
You'll also motice that the halos and crowns are very blank. This is intentionally done, as those are simply placeholders. When I bring this work into Inkscape I will add properly rendered halos and crowns.