This is an easy itinerary. A few months ago a colleague of mine had to fly:
Mon lunchtime depart LIS-LHR-HKG-SYD arr Weds am
Weds all day work in SYD
Wes-Thurs (short) overnight SYD-HKG
Thurs work all day in HKG
Thurs-Fri overnight HKG-LHR-LIS arr back Fri lunchtime
In the good old days an itinerary like that was excuse enough to go First. Nowadays, he had to do it all in Economy, and there isn't a hotel room in the whole week.