Alright, overall I'd say close to half solid, you've chosen some of the biggest names in the meta, along with some pretty rare ones, all with pretty average sets. I'll be changing mostly EVs and moves, but a lot of Pokemon too.
Miraidon
Miraidon @ Choice Specs
Ability: Hadron Engine
Tera Type: Electric
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Electro Drift
- Dazzling Gleam
- U-turn
- Overheat
Only thing I'm changing here is Draco Meteor to Dazzling Gleam, since you state that DG is for dragon coverage. However, Overheat, DM, and DG can all be swapped around in those two slots, just a matter of preference.
Clodsire
Clodsire @ Black Sludge
Ability: Water Absorb
Tera Type: Poison
EVs: 252 HP / 4 Def / 252 SpD
Careful Nature
- Spikes
- Toxic Spikes
- Recover
- Earthquake
I only changed the nature to a -SpA instead of -Atk since you're using EQ. EQ is fine by itself because there aren't a lot of Flying-types in SV AG, only the extremely rare Corviknight.
Palafin
Palafin @ Life Orb
Ability: Zero to Hero
Tera Type: Water
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Flip Turn
- Jet Punch
- Ice Punch
- Close Combat
I got a couple of things to say with this one. First, 100 speed is borderline awful in a world of 135, so you may end up scrapping this thing (speaking from experience). Jet Punch is the main reason it would stay, as you do lack priority like Kingambit's Sucker Punch. Changed Grass Knot to Close Combat due to it being special and a good Dondozo counter is Miraidon (Tera Ground can be U-Turned into Jet Punch from Paladin). Adamant over Jolly because the only important benchmark is Chi-Yu which dies to a Jet Punch. I prefer Choice Band, but Life Orb is a suitable substitute.
Flutter Mane
Flutter Mane @ Booster Energy
Ability: Protosynthesis
Tera Type: Dark
EVs: 132 HP / 252 SpA / 124 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Calm Mind
- Mystical Fire
- Shadow Ball
Only changes are Timid over Modest and the weird EVs that guarantee a Booster Energy speed boost while maximizing bulk. Don't need SpD, it has CM.
Iron Valiant
Iron Valiant @ Life Orb
Ability: Quark Drive
Tera Type: Fairy
EVs: 252 Atk / 16 SpD / 240 Spe
Jolly Nature
- Close Combat
- Knock Off
- Spirit Break
- Shadow Sneak
This thing needed a bigger redesign too. It shouldn't be mixed imo, since you only have one other physical attacker on the team (before my next change). Spirit Break over Moonblast, and the weird EVs guarantee a speed boost with Quark Drive using Miraidon's Electric Terrain. Shadow Sneak is a bit iffy, you might want to replace it with Psycho Cut unless you really want the priority.
Grimmsnarl
Koraidon @ Choice Band
Ability: Orichalcum Pulse
Tera Type: Fire
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Flare Blitz
- Outrage
- Collision Course
- U-turn
Hang on, hang on, let me explain. First, AG is mainly hyper-offensive, two support Pokemon are unnecessary, and I think Clodsire has more potential. Second, you need a third physical powerhouse, and this would be your only second Choiced member. Destroy everything with Tera Fire Orichalcum Pulse Banded Flare Blitz!
Okay, a quick summary:
- Changed Grimmsnarl to Koraidon because HO.
- A lot of nature and EV changes, and occasional move changes.
- Iron Valiant changes from mixed to physical.
Hope I helped!