I had an idea, and was just cut & pasting various pics together to see if i could come up with a workable idea.
Going with my Dragon Knight (Wraithguard) concept, I was thinking of using a Carnosaur as an Wraithlord. If I put it on an Avatar base, take the weapon platform and bent the topside portion of the platform (i.e.: the part that the gun mounts to) around Carnosaur's back (with something like a saddle strap underneath to hold it in place) and a bright lance or whatever mounted on that. Then add a rider, something like my standard Dragon Knight conversion, except maybe with the Exarch helmet. Give him a Shuriken catapult in one arm, and the DE whip arm (pictured) in the other (I figure the Carnosaur can breathe fire for the flamer).
..and ta-dah! An Exodite Wraithlord!
Does that sound like it could be workable?
Photos property of Games Workshop, LLC., used, sliced & diced without their permission.