I am honored that you get inspired about Arcarmon's idea, 'cuz I are Arcarmon XD
Your team is half weak to Water and Ground.
I think you must use another Poison Heal Set:
- Swords Dance
- Stealth Rock
And then, you can focus on Spikes and the rest for other Pokémons. Also, switch the HP EVs with the Speed so that you have hopes to outspeed some Pokémon. Jolly > Adamant because of Swords Dance. Walled by Flying, though. You can replace E-Quake by any attack you judge good, but I selected the best.
I think you should replace it for Forretress for a Spinner and Spikes. So:
Forretress @ Red Card:
EVs: 252 HP / 252 Def / 4 Sp.Atk or Atk
IVs: 0 Speed
- Gyro Ball / Volt Switch
- Rapid Spin
- Toxic Spikes
You already have Stealth Rock so, Spikes and Toxic Spikes will deal alongside Stealth Rock cheap, free and nice damage + bad poison, starting to take a lot of HP from the first turn. So, yeah. Gyro Ball will be a surprisingly strong move due to STAB and lack of Speed, but Volt Switch may scout for you, if you still need Forretress. Rapid Spin will eliminate Hazards, Leech Seed and some other things from your side of the field.
C'est un choix Parfait! Perfect. No other Pokémon can add more to your team, as being a Gravity set-upper and an anti-spin, as well as an annoyance. Do not forget the boost of accuracy Gravity adds; you should abuse Will-O-Wisp, and the moveset is totally fine. I would switch the Speed EVs with the Attack.
It is Ubers. You ain't gonna use this team in Ubers where it gets smashed by Rayquaza, do you ?
No, no. So, forget it. Let us see... what do we... Ah, I know! Why not having a third Gravity user ? Registeel may fill the role well.
Registeel @ Lum Berry:
Trait: Clear Body / Light Metal
EVs: 252 HP / 252 Sp.Def / 4 Sp.Atk
- Flash Cannon
Gravity is your team's basement. Toxic + Protect = Annoying stall combo, awesome with this specially defensive robot. And Flash Cannon is STAB.
I really do not know. If we should replace for Hippowdon or not. If you want, then go for my set. If you do not want to replace it, then go for:
Tyranitar @ Choice Scarf:
Trait: Sand Stream
EVs: 252 HP / 200 Atk / 56 Sp.Atk
- Fire Blast / Thunderbolt
- Ice beam / Pursuit
- Stone Edge
Use either Ice Beam and Thunderbolt for the Bolt-Beam combo, or Fire Blast + Pursuit for scaring opponents.
- Bullet Punch
- Stone Edge
And 252 Atk / 252 HP / 4 Sp.Def, with either Jolly or Adamant nature. Here, your choice is wide open.
Hope I helped!
Your is still half weak to Ground but you can replace Metagross for Landorus with Sand Force or Latias. Here are some ideas you should consider.