Water these plays?

Araquanid @ Choice Band
Ability: Water Bubble
EVs: 248 HP / 252 Atk / 4 SpD / 4 Spe
Adamant Nature
- Liquidation
- Leech Life
- Poison Jab
- Sleep Talk

Nihilego @ Focus Sash
Ability: Beast Boost
EVs: 252 SpA / 8 SpD / 248 Spe
Timid Nature
IVs: 0 Atk
- Stealth Rock
- Power Gem
- Sludge Wave
- Thunderbolt

Pinsir-Mega @ Pinsirite
Ability: Moxie
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Quick Attack
- Return
- Earthquake
- Swords Dance

Marowak-Alola @ Thick Club
Ability: Lightning Rod
EVs: 60 HP / 196 Atk / 220 SpD / 32 Spe
Careful Nature
- Earthquake
- Flare Blitz
- Shadow Bone
- Will-O-Wisp

Dhelmise @ Assault Vest
Ability: Steelworker
EVs: 200 HP / 252 Atk / 56 Spe
Adamant Nature
- Heavy Slam
- Power Whip
- Earthquake
- Rapid Spin

Magearna @ Fightinium Z
Ability: Soul-Heart
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Shift Gear
- Thunderbolt
- Flash Cannon
- Aura Sphere