The mana base plays a little slow right now, and will keep you a turn behind until midgame. Maybe look at replacing some of the triomes with
shock lands so you can rush out additional colors as needed. I like the gates for being able to have more flexibility in filling out the color wheel.
I don't think
Anikthea, Hand of Erebos goes well with Shrines because she'll be exiling them, and you already have graveyard play from your commander. Instead, try to get value out of sacrificing enchantments or having enchantments ETB.
Constellation effects or cards like
Ghen, Arcanum Weaver would work great for this, the latter giving you a cheaper bounce than the commander.