Looking to see what people think about card choices, or if they had any input on additions.
i would get rid of the astral cornicupia unless your running the High Tide Palinchron mana combo in which case you could put as much mana into the thing as you want so you have oodles of mana for other turns.
i think trickbind is way better than stifle in an edh situation. the one mana is less likely to break as it would in legacy. also there's not a whole lot they can do to stop it. coalition relic has been a solid mana rock. just pay attention to it. my niv-deck and large maybe board may give you some other ideas.
if your running a bunch of fetchs crucible of worlds makes never missing your land drops fantastic. I found the extra card draw usually made that aspect not so much of an issue anyway.