Best way for UCS with 100,000 miles

I have to admit to normally flying the oposition (BA) but have just swapped my AMEX points for 100,000 flying club points.
My wife and I are looking to fly into San Francisco and out of Boston in September time and I was looking for advice on the most cost effective way to do the trip in UCS. Looking at it I can:
Use 40,000 each miles to upgrade from preminm economy
Buy an upper class ticket and use FC points for Companion ticket
Buy an upper class ticket and use miles for a free UCS ticket.
I just want to understand what ticket restrictions there are based around the 3 options.
Sorry for the rambling post but it has been a number of years since I flew upper class and am a bit out of touch on all this.
Thanks in advance
Pete.
My wife and I are looking to fly into San Francisco and out of Boston in September time and I was looking for advice on the most cost effective way to do the trip in UCS. Looking at it I can:
Use 40,000 each miles to upgrade from preminm economy
Buy an upper class ticket and use FC points for Companion ticket
Buy an upper class ticket and use miles for a free UCS ticket.
I just want to understand what ticket restrictions there are based around the 3 options.
Sorry for the rambling post but it has been a number of years since I flew upper class and am a bit out of touch on all this.
Thanks in advance
Pete.