Detailed description:
I wanted to make use of this node by combining Skill Elemental Nova + helmet Crest of Unity + off Hand Gordian Prism in order to have a fast cycling of the Runes and get rid of the Runic Invocation cooldown from Enigma and Author of Arcana.
It appear the node does nothing, the runes cycle as expected but there is no added cooldown reduction. (only the expected cooldown reduction from Adept Runescribing works)
I tried Enigma alone and Author of Arcana alone with same results, no added cooldown reduction.
Please give Runemaster some needed love, the only viable way to play it at the moment is without using runic invocation 