Add:

Lands:

Your average converted mana cost is low enough to go to 33 or 34 if you had mana dorks.

Holdout Settlement and Survivors' Encampment are just Springleaf Drum on lands. These are reasonable, depending on how hard your game plans need Kalamax or not.

Creatures:

Rashmi, Eternities Crafter: Rashmi is incremental advantage. You and both know that you are going to play cards on other people’s turns, so why not get free stuff for doing so? Wavebreak Hippocamp does the same thing if you want more of this effect.

Birds of Paradise, Llanowar Elves, Elvish Mystic, Arbor Elf, Priest of Titania, Rattleclaw Mystic. I prefer creature-based ramp if I’m playing . Most of these cards will Pod into Corridor Monitor, Deceiver Exarch, and Pestermite.

Spellseeker: Spellseeker grabs most of the instants and sorceries in your deck and more food for Prime Speaker

Torrential Gearhulk: Snapcaster Mage #2 aka Fatcaster mage. The 5/6 body is nice for when games go longer than expected.

Thing in the Ice  ^Flip: I noticed that you don’t have ways to protect yourself. If played earlier, you can flip Thing in the Ice and reset that battlefield. It was dumb in other formats, it’s dumb in EDH as well.

Niv-Mizzet, Parun: End-game beater and a storm card. Not necessary but strong.

Creature Tutors: Finale of Devastation, Eldritch Evolution, and Neoform. More tutors for consistency.

Instants and Sorceries

Reality Shift and Rapid Hybridization: Good removal outside of and . Do you really care about a 3/3 beast or a 2/2 manifest token? I don’t……

Manamorphose: Just a good cantrip in Temur.

Swan Song: Another good counter spell, but you have that covered pretty well. Once again, no one cares about one 2/2 bird….no one…

Reiterate: Goes infinite with Turnabout and Dramatic Reversal and or more mana. However, I think Isochron Scepter is just better if infinite mana is the goal.

Nature's Lore: This is only and grabs any forest onto the battlefield. Most of the time, you are going to tutor for Forest, so why not grab Breeding Pool instead?

Artifacts

Isochron Scepter: Goes infinite with Dramatic Reversal and works with most of your spells.

Primal Amulet  ^Flip: Cost reduction and flips into a land that copies spells

Cuts:

Raging Ravine: Ok, it has your colors. Are you ever going to activate this man-land? Also, it comes in tapped. Gross….

Arch of Orazca: I think Arch is better in decks that lack access to card draw. You’re in . Drawing cards, most of the time, is not going to be a problem for you.

Frilled Mystic and Mystic Snake: I’ve fallen for this trap too. I don’t want to pay for a counterspell on a weak 2/2 body. Compare these two cards to other mana spells like Cryptic Command. This cards counters, protects, and draws cards. I prefer utility creatures with more flexibility.

Gruul Signet, Izzet Signet, Simic Signet, Talisman of Creativity, Talisman of Curiosity. This is just another personal preference. Mana dorks > Mana rocks in decks.