When I just started flying to BKK with RJ,I tried all the options available to me: TG,QF (before it closed),JL and CX (before it was upgraded). TG was hopeless (QR/RJ pax get sent there by default),QF was good for a shower,JL was good for being empty,but nothing else.
CX lounge really beats all the lounges mentioned above.As for MH lounge (Louis Tavern),it's also hopeless,I left 2 minutes after entering.