I was looking around and seeing some more interesting Pokemon to use in Unnatural

Iron Thorns here would be a Modest nature Pokemon, allowing it to double its SpA, which makes it a big threat. 70 is a pretty high lowest-stat and combined with Quark Drive and its surprisingly great special movepool, Iron Thorns would make a great special wall breaker.
Iron Thorns @ Booster Energy/Choice Specs
Ability: Quark Drive
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Thunderbolt
- Ice Beam
- Volt Switch/Stealth Rock/Spikes
- Earth Power
Pretty standard set with BoltBeam coverage and Earth Power, and either Volt Switch or Stealth Rock for utility. After boost from Modest, you hit 478, which is just under Modest Kyurem-White. You then have either Booster Energy or Choice Specs to boost the firepower even more.
Iron Thorns @ Power Herb
Ability: Quark Drive
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Meteor Beam
- Thunderbolt
- Ice Beam
- (any filler move)
This set utilizes the fact that Iron Thorns also has STAB Meteor Beam. Since BoltBeam is already really good coverage, your last moveslot can be really anything. Taunt, Thunder Wave, more coverage moves like Earth Power, Focus Blast, Flamethrower, or Power Gem.

Scream Tail gets a substantial boost to its offenses in this Metagame, having actually slightly less SpA than Iron Thorns, but with a much higher speed stat and Calm Mind.
Scream Tail @ Booster Energy
Ability: Protosynthesis
EVs: 4 Def / 252 SpA / 252 Spe
Rash Nature
IVs: 0 Atk
- Calm Mind
- Psychic/Psyshock
- Dazzling Gleam
- Flamethrower/Focus Blast
Scream Tail has several options for special moves, like Psychic/Psyshock/Noise, Dazzling Gleam, Focus Blast, classic elemental moves, and even Boomburst. You can mix and match the special moves you want to use, at least having 1 STAB and a way to beat Steel types. Wouldn't recommend using bulkier calm mind with Wish since you're using Rash nature.
Scream Tail @ Grassy Seed
Ability: Protosynthesis
EVs: 4 Def / 252 SpA / 252 Spe
Rash Nature
IVs: 0 Atk
- Calm Mind
- Stored Power
- Dazzling Gleam
- Encore
This set utilizes Stored Power in conjunction with Grassy Seed and Calm Mind. You can break past any resist with Stored Power after a few Calm Minds + Seed, only worrying about Dark types which you have Dazzling Gleam for. I put Encore as the last move as it can allow Scream Tail to set up easily similar to Iron Valiant.
There are also potential sets likes Choice Specs/Scarf with 3 attacks and Trick or 4 attacks, and you can even utilize Throat Spray sets as well. It's a very diverse Pokemon and a potential powerhouse in the meta.

Arcanine regularly is pretty underwhelming and you'd usually prefer its Hisui counterpart. However I think this metagame can help it massively. Having its lowest stat be SpD compliments Arcanine well with its ability Intimidate too. After that SpD boost, you become tanky on the special side and can weaken physical attacks with Intimidate and Will-o-wisp. For comparison
252+ SpA Choice Specs Magnezone Thunderbolt vs. 4 HP / 252+ SpD Blissey: 142-168 (21.7 - 25.7%) -- 1.4% chance to 4HKO
252+ SpA Choice Specs Magnezone Thunderbolt vs. 252 HP / 4 SpD Blissey: 186-220 (26 - 30.8%) -- guaranteed 4HKO
252+ SpA Choice Specs Magnezone Thunderbolt vs. +2 252 HP / 252 SpD Arcanine: 111-132 (28.9 - 34.3%) -- 3.4% chance to 3HKO
Arcanine isn't as bulky as Blissey sure, but that is pretty damn impressive since Arcanine would also have resistances, better physical bulk, usable SpA, and can threaten most physical attackers with Will-o-wisp or Scorching Sand.
Arcanine @ Heavy-Duty Boots
Ability: Intimidate
EVs: 252 HP / 4 Def / 252 SpD or 252 HP / 252 Def / 4 SpD
Calm Nature
IVs: 0 Atk
- Morning Sun
- Will-O-Wisp/Scorching Sand
- Flamethrower
- Roar/Extreme Speed
A set like this would be standard defensive set. You have healing and HDBs for longevity, Will-o-wisp and Scorching Sand for burns, Flamethrower as a good STAB option, and either Roar or Extreme Speed. Roar can rack up hazard damage as most players typically switch when they get Intimidated, and it can allow you to remove set up sweepers too. Extreme Speed is Extreme Speed. Even if you need Calm Nature, +2 priority and 80 BP will always be good.

One other Pokemon I'd like to talk about is Minior. Minior is a unique case where it's a form changing Pokemon that changes stats mid-battle. Because of this, Minior can run either Hasty or Sassy nature, and the respective form would get that boost. I don't know if it'd be that good, but it'd be fun. With a Hasty Nature, Minior gets to have "good" bulk while being blazing fast, letting it Shell Smash reliably. Afterwards it can change forms while below half health, still having a massive speed stat but without the Unnatural boost it gets in its Meteor form. Which is fine as you'd Shell Smash anyways to have +2 Speed as well as +2 Atk and SpA.