Well, which do you want to maximize, miles or FC? You have a lhr-dub return that you can buy separately and use those segments for another return trip within Europe? Except for DUB-DXB's new service, all will be in euro-biz. True, EI's long haul biz does not compare with other's, but it sure is better than any other euro-biz service. And it adds lot of miles. Within Asia, there are longer HKG return flights, ie CMB and DPS. But, you can forgo some miles and fly CX FC HKG-NRT.