I think the team comp is solid, I just don't know what sets to run on them.
Tapu Bulu @ Grassium Z
Ability: Grassy Surge
Level: 50
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Wood Hammer
- Horn Leech
- Stone Edge
- Protect
Tapu Koko @ Life Orb
Ability: Electric Surge
Level: 50
EVs: 252 SpA / 252 Spe
Timid Nature
- Discharge
- Thunderbolt
- U-turn
- Protect
Arcanine
Ability: Intimidate
Level: 50
EVs: 252 HP / 4 Atk / 252 SpD
Gentle Nature
- Snarl
- Flare Blitz
- Roar
- Protect
Gastrodon @ Leftovers
Ability: Storm Drain
Level: 50
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk
- Ice Beam
- Recover
- Scald
- Protect
Raichu-Alola
Ability: Surge Surfer
Level: 50
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Fake Out
- Psychic
- Thunderbolt
- Protect
Muk-Alola @ Aguav Berry
Ability: Gluttony
Level: 50
EVs: 252 HP / 88 Atk / 100 Def / 68 SpD
Sassy Nature
- Taunt
- Knock Off
- Poison Jab
- Protect
Tapu Bulu @ Grassium Z
Ability: Grassy Surge
Level: 50
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Wood Hammer
- Horn Leech
- Stone Edge
- Protect
Tapu Koko @ Life Orb
Ability: Electric Surge
Level: 50
EVs: 252 SpA / 252 Spe
Timid Nature
- Discharge
- Thunderbolt
- U-turn
- Protect
Arcanine
Ability: Intimidate
Level: 50
EVs: 252 HP / 4 Atk / 252 SpD
Gentle Nature
- Snarl
- Flare Blitz
- Roar
- Protect
Gastrodon @ Leftovers
Ability: Storm Drain
Level: 50
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk
- Ice Beam
- Recover
- Scald
- Protect
Raichu-Alola
Ability: Surge Surfer
Level: 50
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Fake Out
- Psychic
- Thunderbolt
- Protect
Muk-Alola @ Aguav Berry
Ability: Gluttony
Level: 50
EVs: 252 HP / 88 Atk / 100 Def / 68 SpD
Sassy Nature
- Taunt
- Knock Off
- Poison Jab
- Protect