Rate this shit. (water team)

Your typical rain lead takes anything other than electric moves with easy and will do about more than half to any poke that doesnt resist

Politoed (M) @ Leftovers
Trait: Drizzle
EVs: 255 SAtk / 255 SDef
Calm Nature (+SDef, -Atk)
- Scald
- Hypnosis
- Ice Beam
- Hidden Power [Ground]

Lightning rod is to take elictric moves and makes people go WTF.

FUCK YEA (Seaking) (M) @ Choice Band
Trait: Lightningrod
EVs: 255 SAtk / 255 Spd
Modest Nature (+SAtk, -Atk)
- Scald
- Hydro Pump
- Ice Beam
- Megahorn

Takes thunders and water moves easily and has levitate pefect.

Rotom-W @ Choice Scarf
Trait: Levitate
EVs: 255 HP / 255 SAtk
Modest Nature (+SAtk, -Atk)
- Shadow Ball
- Volt Switch
- Hydro Pump
- Sucker Punch

Again. WTF.

Qwilfish (M) @ Leftovers
Trait: Swift Swim
EVs: 255 Atk / 255 Spd
Lonely Nature (+Atk, -Def)
- Sludge Wave
- Waterfall
- Selfdestruct
- Ice Beam

Very strong and as a bonus has swift swim

Armaldo (M) @ Leftovers
Trait: Swift Swim
EVs: 255 Atk / 255 SDef
Careful Nature (+SDef, -SAtk)
- Earthquake
- Swords Dance
- X-Scissor
- Brick Break

Stoping sweepers and pawns water types

Galvantula (M) @ Leftovers
Trait: Unnerve
EVs: 255 HP / 255 SAtk
Timid Nature (+Spd, -Atk)
- Bug Buzz
- Thunder
- Thunder Wave
- Disable

Name Item Ability Nature
Seaking Life Orb Swift Swim Lonely

Moveset
~ Waterfall / Aqua Tail
~ Megahorn
~ Return
~ Ice Beam

I would run Swift Swim Instead of lighting rod, with life orb. This way you get better speed, better move coverage and comprobable damage to that of a choice band set. If you wanted you could sacrifice some speed EVs to SpAtk, if you decided to go with Hydropump over waterfall or aqua tail.

252 Atk / 44 SpAtk / 208 Spe

Also if you want a good Pokemon that absorbs electric attacks you could go with Jolteon, and Rotoms Levitate (or even a Gyarados) would get good coverage with Jolteon. Gyarados also gets rid of that grass suppereffective damage. Just some suggestions. Good luck.