I'm studying a patient pattern that presents with classic Liver and Kidney Yin deficiency — the kind addressed beautifully by the Six-Ingredient Rehmannia Pill. However, there are also clear signs of Dampness and Phlegm accumulation: a greasy tongue coat, heavy limbs, and foggy thinking. Simply tonifying Yin risks further clogging the middle. How would experienced practitioners think about modifying the formula, or combining it with another classical formula, to address both layers simultaneously?