So, I've browsed thru the thread, though not every post and wanted to see the rules for the GGL joker. It talks about a return flight, does that mean it is valid for a maximum of two legs?

For context, I will make GGL for the first and last time in about a month (I won't survive the subsequent cull as my earning is 90% on partners). I live in Asia (HKG), and family group of 3 will also end up with about 6xGUF2 and 4xGUF1 by 1 April, to which I'd add 3 jokers (plus another 2 after April). You can tell I've not been doing a great job of spending avios, I've been using cash as I've got about 1.5m Avios to burn.

I seem to recall the GUFs are valid for up to 4 legs. From reading the thread I'm starting to feel the jokers aren't as valuable to me really as all those GUFs could do the same to get me space in A class.

My ambition is probably to book something like KUL/SIN-LHR, then on to the USA in First during the early summer. If it gets us more I could probably throw a few days in the middle east there too (e.g. Nested returns of SIN-LHR-BAH // BAH-LHR-ORD)

Any thoughts, it seems I may as well book now, as I don't need the jokers? Or do they give me something else extra? Maybe I throw in my parents too so we use 5 rather than 3 seats (if I can find that many A seats), making the jokers useful again?
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Appreciate your thoughts.