You can do anything you'd like to do with monitoring, near, mid, or anything else that works for you.
Recall that Dave Kutch mastered Alicia Keys last album on FOCAL SOLO6 BE nearfields, and did it in a make-shift mastering studio created at AK's personal studio.
As always, it's less about the gear, and more about the ears.
If you want to see Kutch comment in a vid about why he likes to master on these Focal near fields, click here:
They like Focal.