...the statue will be like a demon-dragon-dark rider kind of thing, all mixed together...
Hmm, Arangol, i didn't see anything looks like "demon-dragon-dark rider" in your sculpture. It's looks like vault ghost in ordinary shroud with strange pose (it's similar to zombie's pose from Resident Evil 2)... Because it's mainly klyros i think that statue can represents mournful klyros-female in sorrowful pose. Wings could be a little bit exaggerated. Also, i think it would be more interesting, if klyros sculptures will be in another style, non realistic. And as i see last screenshot it has a huge amount of polygons (What is polycount?). I suggest you first to draw a sculpture on paper: front view, side view, may be rear view...
More over, if it called "Well" it is not mean that it got to looks like common well (looks like well from film "The Ring" :>O.....