Given your desire, the way I would do this would be to:
Edit as desired in Photoshop.
Save as PSD with full compatibility turned on.
Import the PSD file into LR.
Continue the editing in LR as needed.
Given your desire, the way I would do this would be to:
Edit as desired in Photoshop.
Save as PSD with full compatibility turned on.
Import the PSD file into LR.
Continue the editing in LR as needed.