Answer 1

Surskit@Life orb
Ability:Swift swim
Nature:Modest
EV's:20 Def / 200 SpA / 20 SpD / 236 Spe

-Hydro Pump
-Giga Drain
-Signal Beam
-HP Fire

This is a special sweeper which is awesome when it is used in the rain!

Answer 2

Rain Sweeper

Surskit @Choice Scarf

Nature: Timid (+Spd -Atk)
EVs: 252 Spd, 196 SAtk, 60 HP
Trait: Swift Swim

Signal Beam
Scald
Giga Drain
Hidden Power (Fire)

Comments

That's not very good, Psybeam is a weak low powered move without stab, and doesn't cover anything.
Shadow Ball also won't work too well with Surskit because it doesn't cover anything.
Bubblebeam is a low powered move, not the best idea.
Signal Beam is good though.
The moveset should be this:
-Scald - Stab, good power, good accuracy, chance to burn. Or -Hydro Pump - Great power, low accuracy, STAB.
-Signal Beam - Stab, good power, good accuracy, chance to confuse.
-Giga Drain - Good power, recovers HP.
-HP Fire - Good coverage
Or maybe if you wanna take a move out of those for
-Ice Beam - Good coverage, good power, chance to freeze.

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It is a bad set, lol.

Answer 3

Rain dish Surskit.

Surskit@Leftovers
Ability:Rain dish
Nature:Calm
EV's:252 Spe/252 Sdef/4 Spa

-Rain dance
-Scald
-Ice beam
-Signal Beam

Answer 4

Special Sweeper

Name: Surskit
Item: Choice Specs
Nature: Modest/ Timid
Trait: Swift Swim
EVs20 Def / 200 SpA / 20 SpD / 236 Spe

Moveset
~ Hydro Pump
~ Signal Beam
~ Hidden Power Fire / Hidden Power Fighting
~ Giga Drain