You are running Hyper-Offense team and Rocks are very important for it to break Sash and Sturdy(Skarmory and some other stuff).Instead you can run a balance team.
The M-Ray set seems to be solid with LO.I too prefer Earthquake over V-Create due to its Speed drop.
Band M-Ray is another option if you'd like.
Primal Groudon being Defensive is better than offensive.
Groudon-Primal @ Red Orb
Ability: Desolate Land
EVs: 252 HP / 4 Atk / 32 Def / 220 SpD
Careful Nature
- Precipice Blades
- Toxic
- Roar
- Rest
>252+ Atk Groudon-Primal Precipice Blades vs. 252 HP / 32 Def Groudon-Primal: 356-422 (88.1 - 104.4%) -- 31.3% chance to OHKO
>252+ SpA Xerneas Focus Blast vs. 252 HP / 220+ SpD Groudon-Primal: 115-136 (28.4 - 33.6%) -- 0.2% chance to 3HKO
>224 SpA Neuroforce Necrozma-Ultra Earth Power vs. 252 HP / 220+ SpD Groudon-Primal: 232-275 (57.4 - 68%) -- guaranteed 2HKO
>252+ Atk Neuroforce Necrozma-Ultra Earthquake vs. 252 HP / 32 Def Groudon-Primal: 235-277 (58.1 - 68.5%) -- guaranteed 2HKO
This set is a tank and Specially defensive.You can Toxic any mon and just switch the opponent using Roar is there is some drastic stat boost.This also provides a Geomancy Xern check and also breaks Smeargle.
If you run a CM set then it should be Defensive.
Kyogre-Primal @ Blue Orb
Ability: Primordial Sea
EVs: 252 HP / 236 Def / 20 SpD
Bold Nature
IVs: 0 Atk
- Scald
- Ice Beam
- Thunder
- Calm Mind
252+ Atk Choice Band Rayquaza-Mega Dragon Ascent vs. 248 HP / 236+ Def Kyogre-Primal: 322-381 (79.9 - 94.5%) -- guaranteed 2HKO
Heavy Rain
>0 SpA Kyogre-Primal Ice Beam vs. 4 HP / 0 SpD Rayquaza-Mega: 432-512 (122.7 - 145.4%) -- guaranteed OHKO
Strong Winds
>+1 0 SpA Kyogre-Primal Ice Beam vs. 4 HP / 0 SpD Rayquaza-Mega in Strong Winds: 326-384 (92.6 - 109%) -- guaranteed OHKO
This is a tank too.A reliable M-Ray check.Also ignores Evasion with Thunder.
Sash Marsh is broken easily with rocks.LO will be better but I think there is no need for it in this team.
Marsh check would be better.
Arceus @ Pixie Plate
Ability: Multitype
EVs: 248 HP / 248 Def / 12 Spe
Bold Nature
- Judgment
- Recover
- Defog
- Will-O-Wisp
>252+ Atk Life Orb Rayquaza-Mega Dragon Ascent vs. 248 HP / 244+ Def Arceus-Fairy: 230-270 (51.9 - 60.9%) -- guaranteed 2HKO
>+2 252 Atk Necrozma-Ultra Photon Geyser vs. 248 HP / 0 SpD Arceus-Fairy: 337-397 (76 - 89.6%) -- guaranteed 2HKO
>0 SpA Pixie Plate Arceus-Fairy Judgment vs. 28 HP / 0 SpD Necrozma-Ultra: 308-366 (90 - 107%) -- guaranteed OHKO after Stealth Rock
>0 SpA Pixie Plate Arceus-Fairy Judgment vs. 0 HP / 0 SpD Rayquaza-Mega: 302-356 (86 - 101.4%) -- guaranteed OHKO after Stealth Rock
>0 SpA Pixie Plate Arceus-Fairy Judgment vs. 0 HP / 0 SpD Marshadow: 330-390 (102.8 - 121.4%) -- guaranteed OHKO
Fairyceus checks every physical mons with this set.Aslo burn depletes the Physical attack power and provides times to Defog and recover.
TBH Zekrom isnt needed here.
Arceus @ Dread Plate
Ability: Multitype
EVs: 252 HP / 232 Def / 24 SpD
Bold Nature
- Judgment
- Recover
- Defog
- Toxic
>8 SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 0 SpD Arceus-Dark: 260-308 (58.5 - 69.3%) -- guaranteed 2HKO
>252+ Atk Life Orb Marshadow Close Combat vs. 252 HP / 232+ Def Arceus-Dark: 351-416 (79 - 93.6%) -- guaranteed 2HKO
This is a physical tank too.But very useful and dont think whats the point of running to mons for Physical Defense.It tank a few Fighting type attacks and few Fairy Judgments.
Defensive NDM is the best.
Necrozma-Dusk-Mane @ Solganium Z
Ability: Prism Armor
EVs: 236 HP / 24Def / 248 SpD
Impish Nature
- Sunsteel Strike
- Stealth Rock
- Morning Sun
- Toxic
>252+ SpA Xerneas Thunder vs. 236 HP / 248 SpD Necrozma-Dusk-Mane: 100-118 (25.3 - 29.9%) -- guaranteed 4HKO
>+2 252+ SpA Xerneas Hidden Power Fire vs. 236 HP / 248 SpD Prism Armor Necrozma-Dusk-Mane: 162-192 (41.1 - 48.7%) -- guaranteed 3HKO
This is a special tank.Counters Xerns,Fairyceus and a few other Pokemons.
Pokepaste for this
Hope I Helped.