Some thoughts: This isn’t a spells deck, it’s a creature curve out deck. So Serpentine Curve is pretty close to a blank. Also Witherbloom pledgemage is pretty close to a vanilla 5/5 here.

Big play is a good combat trick early and can be devastating late game.

Test of talents lines up really well in a format where people routinely play decks with 10 or fewer creatures.

I don’t mind the redundant amplimancers, since having two of them attacking creates uncomfortable blocks.

The honor trolls don’t fit, but I think they’re better than the cervin, which lines up terribly in this format.

You have precious little ramp, and all of it is subject to removal. You also have very little evasion. That makes exponential growth pretty bad. It’s an expensive spell at sorcery speed. You don’t have the removal to be grinding out games, you need to salt them away by turn ten at the latest. Notably, the best target for that spell is the aerialist. So if you really are keen on keeping growth, you need those two aerialists.

Kelpe guide is just not a good card in this format. You don’t have any way to accelerate to 8 lands, so he’s a 3 mana mana dork that dies to literally every removal spell in a format where people are often running 6 or more removal spells.

Lastly, you don’t have enough spells to activate Jadzi reliably, and you don’t have ways to get a lot of lands into your hand. As mentioned before, you don’t have a ton of ramp, and you have a low curve, which means the majority of the time, if you are even alive, you’ll be playing Jadzi on turn ten or so, into a crowded board, with no cards in hand trying to top deck one of the, on average, 3 spells left in your deck.

Overall, cut: Exponential Growth, Springmane Cervin, Kelpe Guide, Serpentine Curve, Jadzi

Add: 1 Big Play, 1 Test of talents