I have found that when I get “stuck” in a cul de sac (to use a dear friend’s words), one technique to get you unstuck is time. Step out of the work for a while (even an hour or two), leave it. Sitting there, just looking at the canvas, puts the “idea machine” in a loop and one finds it difficult choosing the next “road”. However, leaving the studio, doing something else for a while, and then coming back often works.
The artist gets off the cul de sac. Try it.