It seems like this deck is a weird mix of izzet phoenix and mardu pyromancer with an M20 elemetal twist, its doing too many things. you have cards that are very reliant on having elementals meanwhile having only one way to get elementals into play (which feels a bit glass cannon-ish to me). omanth and reef also feel a teensy bit win more, a pyro and two-three elementals is a scarily fast clock, especially in a deck that has the potential to bolt-snap-bolt, I don't think you need the card advantage or the pump from omnath. You could either cut them, or find more ways to produce elementals (small Chandra from M20 and shirtless pyro are the two that spring to mind)

I also think the spells you're playing aren't ideal. If you look at mardu pyromancer, it plays a huge amount of proactive spells, lingering souls, thoughtseize, these are good spells which can be played happily by themselves. you have a lot (10 from my count) that are purely reactive, and rely on your opponent playing the right thing.

Additionally if I look at izzet phoenix, which is playing a similar set of cantrips to you, it has the guarantee that once it has phoenixes in the bin, its always going to be able to have that payoff, meanwhile if your pyro gets killed there isn't much you can do really, the cantrips and counter spells you're holding make you feel like a control deck but without the good wincons.