The game usually starts repetitively, Turn 1 Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar go. If you're lucky you might also have the Mox Amber and Brainstorm. This allows you to flip Tamiyo directly. And that is also the main goal of the deck, T1 Tamiyo - T2/T3 Flip - Prolifirate and win after the ultimate or to control the game until your opponents concede.

Of course I play almost all "Draw 2 Cards" draw spells or I play cantrips, which ultimately have the same mana value in most cases.

I also play a lot of ramp spells and also mana dorks. They are there to guarantee your land drops or not to fall behind due to a lack of mana. I also play a lot of Enchantment and Artefact Removal, as these can be really tiring to play against. The Exile Enchantments in particular are a huge problem. The best removals are by far Cancerbloom and Broken Bond

But also to be able to protect against it, I also play a number of protection spells, like Veil of Summer.

Personally, I have decided against counterspells because they do not help me make any progress in my plan. Three Steps Ahead, Archmage's Charm and Malevolent Hermit // Benevolent Geist are the only counterinteractions. Although Malevolent Hermit // Benevolent Geist is actually just there to make my spells uncounterable so that I can't be interrupted when I start comboing.

I also play a bit of graveyard recursion using Timeless Witness, which brings up to 2 cards back from the graveyard, and Colossal Skyturtle, which can be used very variably, be it the recursion, the bounce or a simple 6 /5 flyer with ward 3

I also play Primal Amuelt and here I strongly recommend not flipping the card until you actually have the one spell that you would like to copy, the cost reduction is damn good for the spells. Since most instants and sorceries cost a maximum of 3 mana and some have cost reductions themselves, the amulet is very good for spellslinging

You can win with the following combos:

Prologue to Phyresis and then Prolifirate with the Flux Channeler (other cards also possible)
Hullbreaker Horror + Emerald Collector goes with Mox Amber and the conjured Mox Emerald infinite - if you bounce Emerald Collector you can get several Mox Emeralds. -> Infinite Mana -> Inifinite Bounce -> Infinite Spell Casts -> Infinite Prolifirate
Hullbreaker Horror + Mishra's Bauble + any Mox Mox Amber || Mox Emerald

I also play cards like Geralf, the Fleshwright, Talrand, Sky Summoner, Ominous Seas and Shark Typhoon to build a correspondingly large board if the Prolifirate plan doesn't work.
Otherwise there are numerous draw spells and also the Archmage Emeritus, which lets you draw the entire deck relatively quickly with infinite mana. Luckily, that's exactly why I play Jace, Wielder of Mysteries

The deck is very consistent in its game plan and at the moment I have a 64% win rate on 154 games

Otherwise, this deck is full of card draw, bouce interaction and value.

I'm open to any criticism and suggestions for improvement, just let me know by leaving a comment!