There's a lot happening w/ringlights, AB/WL is coming up w/lighter handholdable units w/substantial power and modeling lights which your more powerful units didn't have until now. You're talking 8x10/stopping down 2 stops 4 bellows ext. The smaller ringlights may not have the power you neet for what U want to do.
I've shot various ways through my Profoto ring, I've mounted it to my MF gear, shot handheld up to MF through the opening of my ring which is sitting on a separate stand, set-up my 4x5/8x10 camera on a tripod, and then shooting through the ring, which is on it's own stand in front of the camera.
At one time I toyed w/the idea of having an adaptor machined so I could mate the ring w/a LF camera on a tripod, but it seemed to me to be too much mass/weight on the front end.