I really like the list! I'm jealous of the mana curve for sure!

No Snow-Covered Mountain? Why the artifact lands? They seem to open your mana base to artifact destruction for no benefit?

It looks like your deck is mostly blue cards, might be worth taking out Vivid Crag for a blue-red dual land (Izzet Guildgate) that way you can run out of vivid counters to play your nonsense and still have access to red.

Is Mistfire Adept good enough? Do you win most games with commander damage or random beats backed up with your commander?

maybe swap Mystic Speculation for Oona's Grace?

Arcane Denial is easy on the mana base and might be better than Hindering Light, also the fallen empires version is super cheap$

Treasure Cruise could be good with all this spells going to the graveyard, delve the full amount!