Resolution wise, we would recommend FHD or QHD:
- 1920 x 1080 Full High Definition (FHD)
- 2560 x 1440 Quad High Definition (QHD)
Having 2 monitors to work on, can also be handy for work efficiency (for example one monitor with Create, another monitor to display documents, but it is not required. (eg. 2x FHD).
Refresh rate is not really important for AR authoring (high refresh rates can be handy for gaming purposes etc., but not required for AR authoring) thus, any should work fine.