I'm actually in Singapore, and everyone and their mother's bank has the options for KrisFlyer miles, but SQ is very stingy on mileage accumulation (10% is the cheapest class for SQ flights).
The 500k for lifetime status is something I could see hitting in the next 15years (assuming over 10% mileage accumulation.
TG is more than 40k/two years, but TK is. I just think that I will fly OZ more than TK. Although it will likely be pretty close.