Debating on removing the following and adding more creature base cards.

Vanquisher's Banner, Howling Mine, Eldrazi Monument

Hey, this looks like a solid list so far, I like it, but there are a few things I highly recommend to make it much faster and more consistent

First off, I would highly recommend more card draw. I see you have some, but it could definitely use at least Rhystic Study and Sylvan Library. Those are possibly the best card draw engines in the format. Skullclamp also looks amazing in this deck.

Secondly, some more mana acceleration would greatly help the speed of the deck. I would recommend at the very least Birds of Paradise, Noble Hierarch, Bloom Tender, Mana Crypt, and Deathrite Shaman. Commander's Sphere, Thran Dynamo, Mana Vault, and Gilded Lotus also wouldn't hurt, but they aren't as essential.

I know they're not warriors and might seem kinda boring, but they are crucial to a successful deck. I would also recommend cutting the lands the enter the battlefield tapped in favor of all the fetchlands and original duals if you can afford them or can proxy them. Considering this optimized landbase, Farseek, Nature's Lore, and Skyshroud Claim all become viable options if you need them since they hit shocklands and the og duals as opposed to Cultivate and Harvest Season (though I don't think you really will need them).

As for cuts, at first glance, Archetype of Aggression doesn't seem overly strong considering the bulk of most of your creatures. Combat Celebrant seems redundant with Najeela, and Thrilling Encore is probably just better than Garna, the Bloodflame, but you might need to maintain your warrior count, you've done more testing than I with this deck, so that's up to you. Aggravated Assault seems unnecessary for the same reason as celebrant, but it's not even a warrior. Wretched Confluence is actually surprisingly weak, I'd recommend cutting that. Chance for Glory isn't really the greatest; it does nothing the vast majority of the game, sometimes all of the game. You're in blue, just run Time Warp if you want an extra turn. Kolaghan's Command is dissapointing in edh as compared to modern. If you're looking for something that hits multiple targets, you can run Decimate and Curtains' Call. I'd also recommend Austere Command for this. Noxious Revival seems kinda unnecessary for this kind of deck, but it's fine.

A few random suggestions to end off, I'd recommend at least having one or two emergency counterspells like Pact of Negation, Negate, and/or Disallow/Counterspell. I would also highly recommend a Craterhoof Behemoth. That thing slaughters people. Eldrazi Monument also seems great in this deck due to all the tokens you're generating.

Sorry, I know that's a lot more suggestions for additions than cuts, but that speaks to the power of the list you already have here. It's kinda tricky balancing the warrior count with other "better" options. Trust me, I played a Gishath, Sun's Avatar deck back when he was released, and keeping dino numbers high while trying to run as many cards that are just better was rough, but it can be done. Keep at it!

EDIT Regarding my statement about removing all of the lands that enter tapped, keeping in a couple bouncelands is probably fine, they're solid outside of cEDH

Also, Cultivate and certainly Harvest Season won't really work as well as you hope if you only have 4 basics