After looking through Gatherer and seeing some recent Djinni from Khans of Tarkir, namely the Jeskai clan, I decided to change the word "Instant" to "Noncreature". The cost reduction being for "noncreatures" is very Jeskai. Those monks sure do love their prowess.
I didn't set out to make a 4 color commander, but I think he turned out pretty well, nonetheless. Let me know what you think either here or in the /r/custommagic subreddit.