another water theme team

[ryandude713]

im interested in building a water type team, and i was wondering which non-legendary water types are considered good, that could fill the last slot

i was thinking

kingdra
swift swim
*insert item*
surf
ice beam
dragon breath
?????

starmie
natural cure
*insert item here*
surf
thunderbolt
psychic
?????

ludicolo
rain dish
shell bell
leech seed
toxic
rain dance
dive

swampert
torrent
*item needed*
eq
rock slide
curse
rest

milotic
marvel scale
*no item here*
no idea for moves

Need one more poke

[Aarkan]

physical sweeper gyarados. sorry, i'm no help with a moveset.

[ryandude713]

should i have another poke w/ rain dane since two of my guys have rain dance related abilities?