Originally Posted by number_6
Just remember only 2 stopovers in continent of origin, so 1 of the 3 LHR routings must be a transit (presumably you would go to DXB immediately after WAW, without a stopover back home). You don't get any extra lounge access due to making Platinum, however it makes the 100% bonus for LHR-SYD unambiguous. I guess that is the only advantage.
Actually with all the options available and new things I'm learning, I'm coming up with a few new ideas. Like doing WAW-LHR-DXB-LHR before Christmas, with the rest of the trip in Spring/Summer next year. Getting AA platinum/OneWorld Sapphire would be handy in case I do any flying with work (which is possible) in the intervening months.