Hi Sharkwil,
I deleted your other post to keep clutter down. First time in a while that Migflanker didn't beat me to it, but that's another story. Anyway, don't worry about that too much. You're not the first to do that, and I'm sure you won't be the last.
To actually answer your question, as far as I'm aware the thru-flights are basically treated as two separate flights as far as nonrevving is concerned, so there would be no advantage to coming from MEL instead of SYD to LAX.
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