Rate my National Dex Anything-Goes team (Peak- No.5)

Question

https://pokepast.es/e0fbf879e0312345
Tyranitar-Mega @ Tyranitarite
Ability: Sand Stream
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Thunder Wave
- Pursuit
- Foul Play
- Stealth Rock

Zacian-Crowned @ Rusted Sword
Ability: Intrepid Sword
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Substitute
- Close Combat
- Behemoth Blade
- Wild Charge

Yveltal @ Life Orb
Ability: Dark Aura
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Oblivion Wing
- Heat Wave
- Focus Blast
- Knock Off

Groudon-Primal @ Red Orb
Ability: Desolate Land
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Swords Dance
- Fire Punch
- Rock Tomb
- Precipice Blades

Ho-Oh @ Heavy-Duty Boots
Ability: Regenerator
EVs: 252 HP / 204 Def / 52 SpD
Impish Nature
- Sacred Fire
- Toxic
- Defog
- Whirlwind

Calyrex-Shadow @ Buginium Z
Ability: As One (Spectrier)
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Nasty Plot
- Baton Pass
- Astral Barrage
- Pollen Puff

This team's main requirements are:

• A solid Sp.Atk apart from Yveltal to which you can Baton Pass from Calyrex-S.
• A good Dynamaxer, which this team lacks apart from Yveltal.
• Zygarde and Primal Groudon counter.
• Is Leftovers or Rest Tyranitar better for this team?
• Is Zacian-C or Mega Rayquaza much better as a physical attacker?

Comments

Primal Kyogre can take out a Zygarde and can switch in to and OHKO defensive groudons with water attacks
I’d say Mega Ray>Zacian, but they are close
And with Mega Ray on your team, run Leftovers>Mega tyranitar


(note:I’m an idiot, so take these with a grain of salt)

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Okay, but Arceus-Ground > Primal Kyogre since it can Refresh to cure Glare paralysis while Rest from PK isn't that reliable. I need to check offensive Groudon, defensive are handled by Ho-Oh.

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I don't know much, but I think that defensive Lugia > defensive Ho-oh.

I think that Mega-Ray > Zacian. But Primal is right that they are so close.

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Lugia is total taunt bait, and having it worsens matchup against Yveltal and Calyrex-S which Ho-Oh can handle easily

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I feel like if you're going to run Baton Pass on Calyrex, use Focus Sash instead of Buginium Z

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No, Baton Pass Z-Rex is different from those Sash gimmicks. Buginium Z allows it to OHKO all of its counter after a Nasty Plot, which is done without a Sash on the predicted switch-ins.