Has anyone done a recent comparison for OW lifetime status across the different carriers, including any clever ways of crediting flights where the carrier and FFP are different?

So for instance a BA flyer crediting to AY to make use of the fact that even though both carriers now have a spend-based model (mileage runs no longer that attractive)... crediting this way will be calculated according to distance flown and booking class tier points multiplier.

Any FFPs that stand out in terms of faster qualification?