There is also a Hilton (Iru Fushi) in addition to the Conrad and the Waldorf.
You say you have 4 stays coming up, you could sign up for the Hilton MVP program and move those to Hilton - that would get you HH gold. No free breakfast at Maldives, but better than nothing. see benefits here.....
http://hhonors1.hilton.com/en_US/hh/about/gold.do