Re SQ - Do note SQ does not fly daily from SIN to AMD.

Also, please note AMD is a mess when international flights come in. With the AI and SQ flights arriving within a few hours of each other, there is usually a one hour line to get into the terminal building. Apparently the number of health officers / doctors for the H1N1 checks as well as Immigration Officers is quite small, and cannot handle the 400 + passengers who arrive on these two flights.
Baggage claim is a joke, with another hour wait, and the area around the carousel jam packed with passengers and trolleys, so you cant get to your bag even if you see it

I would fly to BOM and then take a domestic to AMD