I have long-since dismantled this deck to build others, as this was oppressive in my playgroup. Looking back, some modifications I would do:

Land Count Reduction:

I realize that 38 lands are much too much for what the deck accomplishes. I would take out Alchemist's Refuge to substitute for a Vedalken Orrery or Leyline of Anticipation. I would take out Mirror Pool, Temple of the False Gods, and the three bounce lands that came with the Yidris pre-con. This would achieve a land count of 32 which I believe is enough with the ramp enabled for the deck.

Enchantments: While the expensive enchantments of Zendikar Resurgen and Mind's Dilation are cute, they are unnecessary for the deck to operate. Open slots: 7

Instants: Comet Storm, Curtains' Call, Evacuation, Insidious Will, Naturalize, Negate, Summary Dismissal. All of these can be replaced with more efficient options that do similar things. For this reason, I will keep replacements open and the slots at the same number.

Sorceries: Decree of Pain, Past in Flames, Praetor's Counsel, Saheeli's Artistry, Selvala's Stampede, Volcanic Vision, Sylvan Scrying. Damnation > Decree, Past serves almost no purpose, Counsel is inefficient, Artistry would be a bad Copy Artifact, Stampede is inefficient, Blashphemous Act > Visions, Any good ramp > Scrying. Removing Stampede, Past, and Counsel, that makes 10 spare slots.

Creatures: Torrential, Vorinclex, and Greenwarden are not too necessary for the deck to operate. Vorinclex can be be achieved by having a Mana Flare, and the other two serve as utility slots. 12 Open Slots.

Artifacts: Grimoire is redundant with wheels, so the only change would be to add more of them. More efficient ramp and artifacts could be fairly useful.

Replacements: With the 12 open slots, I would first add Beast Within, Cyclonic Rift, Swan Song, Copy Artifact, Merchant Scroll/Mystical Tutor, Trophy Mage, Whir of Invention, and Paradox Engine. This enables more consistency to find necessary spells and the Umbral Mantle to make infinite mana. The spare slots can be used for tutors to find Thrasios to then draw out the deck and storm off either with Aetherflux Reservoir or Fireball for a large number. Afterwards, faster mana and better lands would be the only other change to make.