oneworld - Low Eco fares in oneworld

Hi
if the topic has been discussed before im sorry, but i could not find it.
if im about to choise what FFP to join in Oneworld, mostly traveling on low economy in scandinavia or europe, wich one to join to get the most out of it?

for example
have a trip booked with Finnair class W to NY from ARN? is there anyone giving 100% for that?
thanks

Generally low econ fares are not good.. and you normally have best luck with the airline you are flying on.

For Finnair W.
Qantas - 25%
Cathay - 0%
AA - 100% base, 50% eqm
Avios - 25%

If your ticket shows an AA flight number, you earn miles as if you were on an AA flight number on AA metal (i.e., 100% EQM).

I recently completed a LONE5 RTW and I am a member of AAdvantage. I think it is probably the best option, especially if you are flying Finnair frequently. I got 100% of base miles with BA and LAN and tried to stay on those carriers (plus AA of course) as often as possible.