Hilton Honors (read all about the recent changes HERE) is currently running a 100% bonus on Hilton Honors Points with a minimum purchase of 5,000 Hilton Honors Points. Using these points effectively can essentially cover your stays in properties like the Hilton Tokyo and the Conrad Tokyo where a room may be expensive in dollars but reasonable as a redemption night.
At the time of writing, it appears that my account can only purchase a maximum of 80,000 Hilton Honors Points each year (I understand that some accounts in the United States are eligible to purchase up to 160,000 Hilton Honors Points). Hilton Honors Points are typically sold at US$10 (approx. S$14) per 1,000 block but you do benefit from a 100% bonus if you buy at least 5,000 points - it is therefore possible to buy 80,000 + 80,000 Hilton Honors Points for US$800 (approx. S$1,123). Make sure you charge this transaction to the DBS Woman's World MasterCard to earn 4 miles per dollar - you can essentially earn at least 4,500 miles from this transaction.
If you are thinking about converting Hilton Honors Points to miles, don't. The rate of exchange is terrible and you are better off keeping them for free nights at aspiration properties.