Best scheme for Thai based Brits

[S13SFC]

My wife and youngest will be based out of Bangkok for 3 years with my 2 eldest and I in the UK until they graduate.

Previously we’ve used the BA Premium Amex to trigger 2-4-1 (utilised this year for Xmas flights) and the Virgin Premier Card (2-4-1 valid until March’26).

We are struggling to work out a strategy for when 1 of us is in the UK and 1 in Thailand.

I’ll be flying out 3 to 4 times a year MAN, BHX or LON), the kids twice each (MAN and LON) probably, and then the Thai contingent flying home for the summer.

Anyone any clever suggestions about the best way to do this as we’ve previously only used them for the US or Europe?