its more about how to get Falcoa into scoring positions mate.. just because he has 20 finishing does not guarantee he will score you 30 goals a season!
you need to look at the quality of the supply and build up play..
what approach are you using? what formation? what settings? for your attackers and Falcao himself..
is he too far forward or is he dropping to far deep, is he roaming out to the flanks etc etc.. there are settings to fix all of this as well as settings to get your midfielders to get better balls to him in order to finish