I think I've got it... playing around with it now that I've got my laptop w/TD on it...
if(NumberOfLeagueMembers < 20, switch(LeagueRank,1,28,2,25,3,22,4,20,5,18,6,16,7,14,8,12,9,9,10,6), if(NumberOfLeagueMembers < 30, switch(LeagueRank,1,32,2,29,3,26,4,23,5,20,6,18,7,16,8,14,9,12,10,9), if(NumberOfLeagueMembers < 40, switch(LeagueRank,1,36,2,33,3,30,4,27,5,24,6,21,7,18,8,16,9,14,10,12), switch(LeagueRank,1,41,2,37,3,34,4,30,5,27,6,24,7,21,8,18,9,16,10,14))))