I have been a devoted OW FF for some years.

I am going to be starting to fly regularly (once-twice a month LAX-Europe) starting in Feb, in F or J. Main destination initially is FCO. So it looks like my best Skyteam option will be AF via CDG.

What would be the best FF program to join in terms of earning, redemption, elite attainability and benefits?

Would any of them comp my OW status? Do they have any fast track to elite status (eg AAdv Plat Challenge)? Or is it not even worth it if travelling in F/J (usually elite level provides elite bonus eg 100% of miles flown).

Thanks for your help.