Is ex-CGK reliably cheaper than from other Asian ports like SIN and BKK? There would be pros and cons - a con for CGK is the requirement for a visa ($) for an overnight stay after the positioning flight (also on return). (I would not be game to have just a two hour transit in the case of separately ticketed flights due to the risk of misconnection.) Seems to me that SIN would be better in this regard. Also SIN has far more flights from SYD should there be issues with the positioning flight.
What are your pros and cons for each of, say, CGK, BKK, SIN and KUL? Grateful for the views of the experts on this forum.