The most natural fields are the ones where the work runs on meaning, image and the human being in front of you. Psychology, especially the depth and art-therapy end of it. Literature, poetry, literary translation. Directing, documentary film, music. Teaching in the humanities, where the job is to enthral rather than simply transmit facts. Contemplative and pastoral work, anywhere from counselling to a role in a hospice. In my experience this Mercury is strongest the moment the task is to feel into something rather than to file it.
Anything to do with children, or with people in a fragile state, tends to go well too. Speech and language therapy, special-needs teaching, early-years work, nursing, palliative care — wherever the deciding skill is the ability to tune to someone else's frequency, this placement comes fully into its own. The same softness that reads as scatter in a spreadsheet reads as presence at a bedside.
Harder going are the professions that ask for technical precision and a quick reaction to numbers. Bookkeeping, straight black-letter law, low-level programming, financial trading — here the scatter on detail tends to become a steady source of errors and worry. I'm not saying it can't be done; the cost of the effort is simply higher than it is for other people, and the wear shows sooner.
In my experience it works best when the person sits in a pair or a team where someone alongside holds the structure: an assistant with the figures and the calendar, an editor with the deadlines, a producer with the budget. That frees up the thing that actually matters here — the capacity to create substance, to sense what an audience is feeling, to find the image that lands exactly right. Working solo without that support, this placement tends to burn out faster than the average person, and to blame itself in situations where the real problem was simply a working format that never fit.