Thanks! Final question, though. Is it worth signing up for M&M via LH or LX, or is there likely a better *A partner? I know you mentioned OZ, but what about the likes of UA (where my miles will likely otherwise be dead), etc.?

Regarding the perks - lounge access is a pretty big one for me, but good redemption and all the others are also fairly important. Due to generally flying SH in Y for work, I can generally offset the extra cost of the ticket from a LCC to a better / more comfortable airline provided it, given that otherwise I'd possibly be expensing things in the airport. Regarding good award redemption - again due to the sheer volume of flying, miles accrual tends to be fairly high despite lower cabins, so bumping up / using a reward flight for a LH in C tends to be the way I try to do things.

The reason I'm a little skeptical about UA is from reading on here about the high surcharge of using awards for partners.