Rate my Gen 8 OU Hyper Offense team

Question

This is one of the first teams I've made.

Excadrill @ Focus Sash
Ability: Mold Breaker
EVs: 4 HP / 252 SpD / 252 Spe
Jolly Nature
- Earthquake
- Stealth Rock
- Rapid Spin
- Toxic

Grimmsnarl (M) @ Light Clay
Ability: Prankster
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Reflect
- Light Screen
- Play Rough
- Taunt

Dragapult @ Choice Specs
Ability: Infiltrator
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Shadow Ball
- Draco Meteor
- U-turn
- Flamethrower

Kartana @ Expert Belt
Ability: Beast Boost
EVs: 252 Atk / 252 Spe
Jolly Nature
- Sacred Sword
- Leaf Blade
- Smart Strike
- Swords Dance

Zeraora @ Heavy-Duty Boots
Ability: Volt Absorb
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bulk Up
- Plasma Fists
- Knock Off
- Close Combat

Garchomp @ Rocky Helmet
Ability: Rough Skin
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Fire Fang
- Scale Shot
- Swords Dance

Comments

I'm pretty new to this Database stuff but isn't Stone Edge or Rock Slide a better move to use than Fire Fang? They both cover Ice, and Fire fang is known for being a prime example of the fact that fire-type physical attacks tend to be underwhelmingly weak? and a rock-type move can hit flying types super effectively and Rock slide can flinch which will be good with the drop to defense and the boost to speed that Scale Shot provides because then Garchomp is less likely to get hit.

---

Also, I would like to point out that Your Excadrill gets hard-walled by Corviknight and Skarmory and it looks like it's supposed to be your lead. I don't know how common those two are but I would assume that Corviknight gets more usage in OU because it actually belongs in the OU tier.

---

I'd replace excadrill with lead mew here.