Thanks all - constantly amazed by how many helpful people there are on here.
Should clarify I’m already at silver (from last year), and due to the outbound F being only a few hundred more (is that usual?) I upgraded on my own dime. That combined with splitting the code at SIN gives me 450 TP there. I should have said that the two status flights I’d have by then are those ones.
I return 10 days later, and having heard good things about the first lounge in Syd, thought it might be worth grabbing two more status flights so I could use it.