Melbourne is 7 hours ahead of Doha
Best overlap: 8:00 AM to 11:00 AM in Doha is 3:00 PM to 6:00 PM in Melbourne.
Keep meetings inside 8:00 AM to 11:00 AM in Doha — that maps to 3:00 PM to 6:00 PM in Melbourne. Melbourne is 7 hours ahead of Doha, leaving about 3 hours of daily overlap — enough for most meetings if you don't leave them too late in the day. Finally, Melbourne observes daylight saving and Doha doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.