thetaxman29 , have you verified that Finnair Plus awards tier points based on the upgraded booking class, and not the original booking class?

If you're expecting to have long-haul Business Class travel on oneworld carriers, you should also look into the Iberia Plus program. Like Finnair, Iberia Plus does not require any flights on its own metal to achieve status.

Also, adding a connection (if you are willing to do that) can be a good way to earn tier points faster in certain programs, like IB Plus.