Cut:

Mana Geyser

Mogg Alarm

Accelerate

Goblin Rabblemaster

2 Mountains

Id add Temple of the False God and Myriad Landscape and cut 2 more mountains for those

Outnumber if you want more target "destroy"

I'd find a slot for Faithless Looting

Mizzium Mortars
I know you don't like being mean, but I'd run Ruination

I also know how you love stax... Meekstone

Spawning Pit can be a great recover card to a board wipe

Chandra, Torch of Defiance is great red card draw and other utility

Desperate Ritual + Blazing Shoal are amazing!

Dualcaster Mage goes infinite with Twinflame and Heat Shimmer, must have.

Possibility Storm is also really good cuz you can stack the triggers so the first spell triggers Zada and then gets exiled.

Gamble - best red tutor.

Since you don't do a lot of interaction, I'd run Price of Glory

Neheb, The Eternal could be good.

Rocks: Worn Powerstone, Thought Vessel, Fellwar Stone

Myriad Landscape works as ramp

No Temple of the False God?

It's kind of expensive but Braid of Fire is amazing!

Id cut Pyromancer's Goggles, 5 mana is way too steep, you are hoping to be winning by then.