It seems most agree on the start: take a 70-200mm or 85mm. But what about the second lens? For me clearly the 50mm f1.8, to get shoots with more context (probably the most quality lens you have for that)
If you know the setting and have flexibility to position yourself I would go with the 85mm.
If you know you will be limited in position (walls, fences, plants, lakes, etc...) the 70-200 is probably better.
Tend to agree with Charlie, I do not know the 210mm but is sounds tempting, however it needs a particular setting and might be better if you are shooting sports hats for example.
The decision does go like this:
1) what is my subject (fitness model is insufficient, full body, bust or head shots is missing)
2) what is my location where I will reach the goal I need to/want to reach
3) what is the atmosphere I want to reach (bokeh, blur, static, moving, flare....), sharpness is not the only criteria
4) what lenses would support this (in your style of shooting) subject, on that location with the atmosphere you are looking for
conclusion, almost nobody can advise you but yourself.