User blog comment:Deshiba/Doom/@comment-4636093-20140123200528/@comment-1330314-20140123215441

The reason the blue support items don't get picked as often is because {{rarr}  is far weaker than  {{rarr}, even on poke champions. The optimal gold gain from both item lines is technically equivalent, except it's far safer and easier to get gold with the yellow support items. Additionally, Nomad's Medallion gives far more mana regeneration than Frostfang, and the AP the latter gives doesn't provide enough power to better reward aggressive play.