In-camera multiple exposure impressions can be challenging....but...they also allow the photographer to dispense of "standard" photographic protocols. If the photo artist decides some of the clouds belong in the foreground...then do it!
This landscape impression required (4) exposures and (2) lenses. Placing such high value components into the foreground required some extreme editing to bring back the details. The constant changing of lenses and longer exposures created the need for artifact removal.
Adobe Photoshop Elements15
Topaz Clairity
Contest Ref