Greetings!
Saturn gives karmic lessons to be learned, seriousness, tragic negative thinking because too much karma in this sphere or too much negative experience. Neptune gives extreme compassion, heavenly love, heavenly highest forms of music and art.
Together they can resonate as negative sides of compassion being empowered such as stigmata: physically experiencing other's pain, insane empathy where you do not know where your person ends and other's person and pain begins. There is no somebody's own pain anymore, but common, there is no more such thing as "own pain", now all world pain is yours as much as everyone's else - it has no private owner anymore.
If such this one is great for healing then. Together with other chart aspects pointing on it such as stellium in 6th these planets in aspect shows extreme talent in healing because extreme talent in understanding another's pain and extreme sense of responsibility for another: this aspect can be sublimated into Hippocratic Oath because is a result of insane compassion and suffering. A lot of suffering aspects can be sublimated into healing - this is what Siberian shamans and shamans all over the world do when get under shaman sickness: they would suffer until they learn to heal - the alleged demand of their higher self.
For TCM / Tibetan medicine any Capricornian-Piscean topics connected would be great because it demands Capricornian discipline and endurance to learn it in its height and vastness. And is deeply spiritual as Pisces are. Not to forget
TCM's psychological aspect as well. And any such intricate vast medic field.
Other great sublimation of everything connected to Neptune and Saturn messed into any artistic sphere is serious art. I wrote about it
here - this one is different, but what we speak about also can be used in serious art due Neptune presence as far as there are other Destiny calls in chart in it.