Yeah so I tried my best on this one I think it turned out pretty good.
Volcanion @ Life Orb
Ability: Water Absorb
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Steam Eruption
- Fire Blast
- Sludge Wave
- Superpower
Seismitoad @ Leftovers
Ability: Water Absorb
EVs: 176 HP / 252 Def / 16 SpD / 64 Spe
Impish Nature
- Stealth Rock
- Scald
- Earthquake
- Toxic
Raikou @ Ghostium Z
Ability: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Calm Mind
- Hidden Power [Grass]
- Shadow Ball
- Thunderbolt
Muk-Alola @ Assault Vest
Ability: Poison Touch
EVs: 204 Atk / 180 SpD / 124 Spe
Adamant Nature
- Pursuit
- Knock Off
- Gunk Shot
- Fire Punch
Latias (F) @ Choice Scarf
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Psychic
- Ice Beam
- Defog
Aerodactyl-Mega @ Aerodactylite
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Stone Edge
- Wing Attack
- Aqua Tail
- Roost
Alright so yeah I did indeed change the set just a little bit to an all out attacking Volcanion with Life Orb instead of Fightium Z, but Life Orb boosted Superpower still 2HKO's and with enough chip can OHKO Blissey. Now I decided to start off with having this thing lure for CM Ghostium Z Raikou since Raikou can't do much to Blissey especially with Blissey being immune to it's nuke (Never Ending Nightmare). So I figured with this a pursuit trapper such as Muk could be great here since another common Volcanion switch in is Latias, and while I do have Raikou which outspeeds and has the super effective Z move, it would be nice to have a switch in with pursuit to provide support for these pokemon. Speaking of Lati, I added Choice Scarf Latias to the squad because of type synergy and speed control, the team desperately needed a ground immunity and some speed control, but Lati also (while not very reliably) provides the hazard control with Defog in the 4th slot. Now with Lati I decided to add Seismitoad for a more reliable answer to Washtom, Stealth Rocks, and something for Muk which can be a real bother for this team. For the last slot I needed a mega, and Mega Aerodactyl seemed like a good one because it would add another ground immunity, and could poke holes in the enemy team allowing for Volc to do what it needs to do and to give Raikou better opportunities to set up. If there are some things to work out that I missed make sure to hmu on Smogon or on PS n_n. (im vivalospride on PS)
Good luck and have fun with the squad!!
Hey man thank you very much, i appreciate it