- Do you want to cover just chest or hip or both? -> 1 or 2/1+1
From here, if you answer no to any below then stop at previous and thats your optimal choice.
- Minimum 5+0 or 3+2 gives you leg and body (not so accurate body).
- Do you need more accurate body hip tracking? -> 5+1 or 6
- Do you need with feet tracking? -> 5+3 or 8
- Do you need with elbow tracking? -> 7+3 or 10
- Do you need full mocap tracking? -> 12 to 20
If you wish to modify you can use .drawio file opened in https://app.diagrams.net/ and open merge request.