Areola Reduction & mastectomy - which approach is safer for nipple survival?

Unfortunately I was diagnosed with breast cancer, left breast. I am scheduled for a mastectomy on that side. I want an areola reduction on the healthy right breast. I have two options: 1) Have a bilateral mastectomy and come back 3-6 months later for areola reduction or 2) have unilateral mastectomy on left side and have areola work done on right side during the mastectomy surgery....I am wondering which approach is safer for nipple survival or if there are equivalent risks?