I did LHR-CDG-AMM-BKK-HKG-TPE-HKG-ICN-HKG-BKK-AMM-CDG-LHR only last month. TPE/ICN trips were thrown in at the very last minute and wished I hadn't. It was exhausting even in J (and not to mention a very scary turbulent flight through a thunderstorm on approach into BKK)!