Since you are in Singapore I would recommend WP over FB. WP redemption levels intra-Asia are about half of FB. I just used 30k miles to fly C on MH NRT-KUL-HAN-KUL-NRT. Asia-based WP members also get lounge access for Golds and Plats, which US based members do not get. It seems WP offers many more bonus offers and even temporary Gold or matching elite status for Asian members on a regular basis.

FB does offer web-awards for 50% off certain award routes and only 40k needed to reach Gold, but discounted fares only earn 25%. Their customer service is also quite poor.