There are several dragonlings in the Urn of Sacred quest. 6+ Drakes. Those 6 will give you scales for Wade to build armor sets, and the others will just be normal enemies to kill. There are 2 Dragons. One in Orzammar Royal Palace and one in the Brecilian Ruins. 2-3 High Dragons. The one in Urn of Sacred Ashes. Flemeth. And the Archdemon(depends on how you look at it).
However only the High Dragon found during the Urn of Sacred Ashes give scales for armor