Note that ex-CMB ALL SQ fares did not increase 15 Sept .. they had already gone up ..but may rise again... C for CMB-West Coast is around USD 1400 ..and best way I had approved by SQ Sales in CMB was a PPS sector run ...
CMSB-SIN-ICN-YVR-SFO (all on SQ or SQ codeshare = OK for PPS [YVR-SFO is an SQ cs on AC] ) then for MR you can add down to LAX, etc
and return.... 17 PPS sectors or about USD92/sector ...and you need 25 to qualify for PPS
A friend just booked this at my suggestion -- for 4 pax in December/January