I like what you've done here, but I have a couple of notes:
For devotion, numeric mana symbols ({0}, {1}, and so on) in mana costs of permanents you control don't count toward your devotion to any color, so
Nykthos, Shrine to Nyx would be dependent on only the white symbols of the creatures. That may have been the intention, and it does help mana ramp a little bit, but I just wanted to put that out there.
Lightning Greaves gives Shroud, which means you can't target the creatures either, meaning you've locked yourself out of adding more equipment to a creature wearing them. Try
Swiftfoot Boots instead, because Hexproof > Shroud 99% of the time.