In general all points involve the shen, but there is a specific relationship between the heart (fire) and the kidney (water) in Chinese Medicine.
That said, with these types of concepts I always feel it is better for the discussion to discuss them in the context of real cases/conditions/issues, not in arbitrary terms as that tends to get too esoteric and too theoretical with less real world meaning and application.
But one branch of Chinese Medicine, namely the worsley five element branch (among others), puts more emphasis on these relationships. Some of the points that you might not have normally thought of from a pure TCM perspective are with the “spirit points” section of my classical five element acupuncture article.
With long yan rou you have tonification of the heart and spleen and blood. There would be many ways to accomplish this with acupuncture points, but they would vary depending on the patient. Further you have to be clear if you simply trying to calm the shen or want to consolidate/tonify it. In my mind these are very different approaches. Calming, points such as HT 7, for example, work well - even stronger approaches like bloodletting HT 9 if you need a stronger approach. But consolidating similar to the quality you can develop within mediation and tai chi, for example, would involve a well tailored protocol individualized to the needs of the patient.
In our Tam healing system, we use GB 13 (frontal lobe) and in some cases GV 19 (the sensory cortex) for some of the issues related to shen imbalances.