I was searching thru the information here, but I am still not clear for me what the best strategy for me is.

I travel mainy on RTW tickets (3 or 4 per year), OW and Star, all in F. For the flights in between I try to get award tickets, also in F.

I like the LH program, because it gives 3.75 x miles in F. So a typical 29 K Miles RTW gets more than 100 K miles - and that is enough for an USA-Europe F award.

The oneworld miles go into my AA account. Because of the changes there (miles conversion of the 500 miles upgrades has changed) AA gives 2.5 times miles flown in F, also the awards between US and Europe are more expensive (and you get them only on AA, which is inferior to many other airlines in F).
So i am thinking of changing to BA or CX, hoping that F awards would be easier to come by.

So please let me know what you think.