Unless you are flying Cathay, Asia Miles is so useless.
+1 on this. I am in Adelaide. To get here, I had a return Cathay Asia Miles flight waitlisted for months. One direction came through; the other did not. So what am i supposed to do? Cathay does not allow mixed tickets, and their one-way tickets are prohibitively expensive (this was biz class).
I discovered that I could use my Qantas points to book the (exact same) Cathay sector that had availability, and then book a paid return, without it getting a "one way uplift". This is all one booking. Wow. So Qantas is getting my money instead.