This is based on (FIFA points for a win) / (actual effort from Elo rating).
Montenegro, Armenia, Norway, Burkina Faso, Switzerland, Guinea and Algeria are still available on March 29th.
Of these 20 teams, only 7 will play a match against a higher ranked team (Elo home advantage included):
Hungary - home and away vs. Netherlands
Northern Ireland - away vs. Serbia
Northern Ireland - home vs. Slovenia
Armenia - home vs. Russia
Denmark - away vs. Norway
Denmark - away vs. Slovakia
Switzerland - away vs. Bulgaria
Slovenia - home vs. Italy
Algeria - home vs. Morocco