It can assuredly be done in practice, with currently available technology. It would, however, be very expensive and time-consuming.
I'm thinking of putting together a set of general biomechanical models for foil or kendo fencing. Both forms feature a highly constrained ruleset, which simplifies things. Hobby project, though, so maybe one of these days...
A model that shows the optimal move for a fighter at any point in time.
You don’t actually have this. It can maybe be theoretically done, but not in practice.