I'm flying a mix of Swiss, Thai and Singapore Airlines First and Biz class in April - all a first for me.

Was looking for advice regarding which lounges to use, seats to pick, services to take advantage of based on my flights?

12:30 LHR-BKK 06:05 TG F
08:00 BKK-CGK 11:35 TG J
stopver
08:30 CGK-SIN 11:05 SQ F
13:00 SIN-HKG 17:15 SQ J
stopever
23:15 HKG-ZRH 06:10 LX F
09:20 ZRH-LHR LX J