Rain team help?

I am new to rain teams, and am not sure if this is a good one(got it off smogon):

Politoed (M) @ Leftovers
Trait: Drizzle
EVs: 252 HP / 252 Def / 4 SDef
Bold Nature (+Def, -Atk)
- Scald
- Toxic
- Encore
- Protect

He's here for obvious reasons


Dragonite (M) @ Life Orb
Trait: Multiscale
EVs: 252 Atk / 252 SAtk / 4 Spd
Rash Nature (+SAtk, -SDef)
- Hurricane
- Aqua Tail
- ExtremeSpeed
- Roost

Good special attacker, and as hurricane always hits in rain, helps alot


Tornadus (M) @ Life Orb
Trait: Prankster
EVs: 4 Atk / 252 SAtk / 252 Spd
Naive Nature (+Spd, -SDef)
- Hurricane
- Hammer Arm
- Rain Dance
- Taunt

not sure about this dude, seemed like a good idea when i put him in there, but it didnt work out well


Ferrothorn (M) @ Leftovers
Trait: Iron Barbs
EVs: 252 HP / 88 Def / 168 SDef
Relaxed Nature (+Def, -Spd)
- Spikes
- Leech Seed
- Gyro Ball
- Protect

very helpful in most situations


Jellicent (M) @ Leftovers
Trait: Water Absorb
EVs: 248 HP / 216 Def / 44 Spd
Bold Nature (+Def, -Atk)
- Scald
- Will-O-Wisp
- Recover
- Taunt

spinblocker, and is good from what ive seen


Toxicroak (M) @ Leftovers
Trait: Dry Skin
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Nasty Plot
- Vacuum Wave
- Dark Pulse
- Sludge Wave

not sure if this dude was a good idea

im looking for a way to make this team balanced and effective in terms of offense. any help is appreciated!

For Dragonite, it's better with a Quiet nature, so that Rash doesn't take away from its good Special bulk (true, the lowered Speed hurts, but ExtremeSpeed and Multiscale can help make up for it).

I think Rotom-W should replace Tornadus, because of its powerful Hydro Pumps in the rain; it's also a good revenge killer with a Choice item:
-Thunder/Volt Switch
-Hydro Pump
-Hidden Power (Ice)
-Trick
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Choice Specs/Choice Scarf