This is based on (FIFA points for a win) / (actual effort from Elo rating).
I ran 10000 simulations using the Elo Ratings for the matches still to be played before the November 2012 FIFA ranking deadline.
I took into account only teams that would bring at least 200 points for an OFC opponent.
Of the top 20 best teams to play against only 8 are still available for the 14 November FIFA match date.
I'm not 100% (thus I can't take the credit for it), but one of teams is no longer available because of a list of ideal opponents I sent to certain FA.
Teams in bold still available:
Central African Republic
Algeria (at home vs. Bosnia-Herzegovina)
Haiti (Caribbean Cup qualification 12 - 19 November in Grenada)
Greece (away to the Republic of Ireland)
Slovakia (away to the Czech Republic)
Switzerland (away to Tunisia)
Norway (away to Hungary)
Czech Republic (at home vs. Slovakia)
Cape Verde Islands
Belgium (away to Romania)
Bosnia-Herzegovina (away to Algeria)
Italy (at home against France)
Colombia (in the US vs. Brazil)
Serbia (in Switzerland vs. Chile)