I had made a few changes to your team before I carried on.
I like team two better, mainly because it has Milotic.
Galvantula (M) @ Life Orb
Trait: Compoundeyes
EVs: 4 SDef/252 SAtk/252 Spe
Jolly Nature
- Energy Ball
- Hidden Power [Ice]
- Thunder
- Bug Buzz
Smeargle (M) @ Leftovers
Trait: Moody
EVs: 252 SDef/252 Def/4 HP
Impish Nature
- Shell Smash
- Baton Pass
- Cosmic Power
- Outrage
Gorebyss (M) @ Leftovers
Trait: Swift Swim
EVs: 252 Def / 252 SDef/ 4HP
Calm Nature
- Ice Beam
- Psychic
- Shell Smash
- Baton Pass
Glalie (F) @ Leftovers
Trait: Moody
EVs: 252 Def / 252 Spd/ 4 SDef
Bold Nature
- Substitute
- Ice Beam
- Earthquake
- Shadow Ball
Huntail (M) @ Leftovers
Trait: Swift Swim
EVs: 252 Def/ 252 SDef/ 4 HP
Calm Nature
- Baton Pass
- Shell Smash
- Scald
- Hidden Power [Fire]
Blaziken (M) @ Air Balloon
Trait: Speed Boost
EVs: 4 HP/ 252 Atk/252 Spe
Jolly Nature
- Stone Edge
- Hone Claws
- Hi Jump Kick
- Blaze Kick
OR
Galvantula (M) @ Life Orb
Trait: Compoundeyes
EVs: 4 SDef/252 SAtk/252 Spe
Jolly Nature
- Energy Ball
- Hidden Power [Ice]
- Thunder
- Bug Buzz
Forretress (F) @ Leftovers
Trait: Sturdy
EVs: 252 Def/ 252 HP/ 4 SDef
Relaxed Nature
- Toxic Spikes
- Rapid Spin
- Stealth Rock
- Gyro Ball
Smeargle (M) @ Leftovers
Trait: Moody
EVs: 252 SDef/252 Def/4 HP
Impish Nature
- Shell Smash
- Baton Pass
- Cosmic Power
- Outrage
Milotic (F) @ Leftovers
Trait: Marvel Scale
EVs: 252 HP/ 252 Def/ 4 SDef
Bold Nature (+Def, -Atk)
- Scald
- Ice Beam
- Sleep Talk
- Rest
Articuno @ Leftovers
Trait: Snow Cloak
EVs: 4 SDef/ 252 SAtk/ 252 Spe
Timid Nature
- Ice Beam
- Substitute
- Air Slash
- Roost
Manaphy @ Leftovers
Trait: Hydration
EVs: 152 Def / 100 SDef / 255 Spd
Hardy Nature
- Aqua Ring
- Ice Beam
- Tail Glow
- Scald