The treatment of Amex 2f1, GUFs, Jokers etc ... and beyond that ticket construction between BA and BA(Comair) is tremendously variable in practice.

What I did or could do 12 months ago has only a moderate predictor on what tomorrow's agent might be able to magic up.

Amex 2f1 is rarely allowed (per BAEC FT threads) and hence I've not bothered via Jokers, as intra SA availability is pretty good anyhow IME