I did this routing in January this year on QF in First Class. By the time I arrived in JFK I was a wreck. I then faced a three hour delay as my flight to SJU was cancelled. I eventually arrived at the Caribe Hilton at about 3:00 am. I had no idea where I was!

I cannot imagine what kind of state you will be in doing the same journey in Business Class but also having flown 10 sectors in the previous 2 days!

I wish you well.