Good day /vp/
Currently building my Rain Team, and after some back and forth this is what I ended up with.
I'm rather new to competitve, so I could use a little word on where the weaknesses in my current setup lie, how to go against them or what is just plain unnecessary. I don't know the online metagame, so I just build the team based on what generally seems good to have.

Jolteon@Damp Rock
Timid, Volt Absorb
- Rain dance
- Thunder
- Shadow ball
- Volt Switch
Used mainly for setting up Rain and giving me some general coverage. Full Speed and Sp.A EVs.

Goodra@Roseli berry
Calm, Hydration
- Rain Dance
- Muddy Water
- Flamethrower
- Rest
Special Wall. Flamethrower for coverage, could use some advice what else to pick, since Flamethrower will be weak in rain. Also not sure on that held item.

Starmie@Leftovers
Timid, Natural Cure
- Rapid Spin
- Ice beam
- Scald
- Recover
Rapid Spinner/Mixed Wall. Pretty basic I guess

Kabutops@Life Orb
Adamant, Swift Swim
- Rain Dance
- Aqua jet
- Waterfall
- Stone Edge
Physical Sweeper. Rain Dance is more or less Placeholder.

Scizor@Scizorite
Adamant, Technician
- Bullet Punch
- Sword Dance
- Roost
- X-Scissor
Support for coverage. Thought it fit well into the team, thanks to rain dance lowering its weakness. mixed Defensive build.

Rotom-W@???
Modest, levitate
- Rain Dance
- Hydro Pump
- Volt Switch
- Thunder/Thunderbolt
Physical Wall/Special Sweeper. very unsure on his item.

I also thought about a physical kingdra instead of kabutops, Wish vaporeon instead of Starmie and maybe using an aquajet Azumarill.