Most of the time, I only do fine adjustments on gamma, contrast and saturation on some photos.
LR for all of my pleasure shots. Rarely do I need to use PS.
LR and PS for product shooting. Ill adjust exposure and color correction in LR, masking work in PS.
For panorama work, Hugin to stitch, then LR for exposure & color correction. PS if I need to do specialty tasks.
Lightroom for everything that doesnt require more than one layer or blending of multiple images.
Id probably say 64/40 split between LR and PS.
What is PS? What is LR.