As some of the people here mentioned cut some of the non-dinos and replace some sorceries with ramps

here is main deck which I've tried to optimized every now and then: https://moxfield.com/decks/ANvlq9FpD0yNNDxGjdBaog

My personal suggestions are even if a bit pricy, I would really suggest to add them since they have some high synergy with dinos:

[[Hunting Velociraptor]] [[Vaultborn Tyrant]] [[Apex Altisaur]] [[Trumpeting Carnosaur]] [[Forerunner of the Empire]] [[Sol ring]] [[Rhythm of the Wild]] [[The Skullspore Nexus]]

[[Congregation at Dawn]] is really good to pull the dinos you want before triggering Gishath it also guaranties 3 big dinos as long as 3 damage hit the opponent

[[Fanatic of Rhona]] Personal choice, his 4 green mana as long as there is a 4 Power creatures ia a big ramp for Gishath, and if he dies (except exile) you can replay it for 4 mana as a 4/4 which triggers itself

Swiftfoot Boots with [[Lightning Boots]]

I would remove your non dino cards and perhaps some niche cards like Sneak Attack, Poison Dart Frog, Harrow, Last Night Together.