Runic leather, Phoenix Weave and Asmodeum are the top T5 crafting ingredients in their categories, it would make sense to have them be obtained on the same scale, except that Cinnabar and Tolvium are limited to only orichalcum ores (and dungeon rewards), where Scarhide, Smolderhide, Scalecloth and Blisterweave can all be obtained from numerous sources.
Either make the materials for Asmodeum obtainable through numerous sources, or make the materials for Phoenix Weave and Runic leather less obtainable to balance them out.