Around $4,500 cash out the door in March/April 2014 3 days in London, 1 in Abu Dhabi, 6 in the Maldives....
Flights: BA in J MCO-LGW, AUH-LHR-PHL and EY LHR-AUH-MLE-AUH in Diamond First... BA companion pass + miles + over $2k in taxes... AA miles on EY
Hotels: all on points, though the RT seaplane to the Conrad was roughly $1000
Food, whale shark excursion, etc was the rest.
I actually pulled up my CC statement from last year to check on what I spent for a friend who is doing a similar trip a few days ago. Total was just under $4500.