Politoed
I see you're taking an offensive approach.
If the speed EVs are there to outpace a certain speed tier, and works well, you might keep it.
If not, I suggest you just use the standard 252 SpA / 4 SpD / 252 Spe spread.
Also, you should try out the standard physical defensive bulky Politeod, as the team doesn't seem to have much to fall back on.
The Politeod is the first set here.
Whiscash
Looks pretty good.
You can also try out an annoying Vaporeon in the rain with Rest hydration, but that's pretty much not for sweeping more for stalling.
Raikou
I think you should try out Hidden Power Ice for all the Pokemon x4 weak to it in OU, including that pesky Dnite.
I'm not 100% what to replace it with, probably what you find least use for.
Tornadus
I again suggest trying out the bulky Politoed, and then Specs Tornadus might be nice.
Tornadus @ Choice Specs
EVs: 4 Def / 252 SpA / 252 Spe
Naive Nature
- Hurricane
- Focus Blast
- Hidden Power Ice
- U-turn
Put the 4 leftover EVs in Def because with 4 HP Tornadus will only be able to switch into the field when rocks are up 3 times instead of 4 (technically 5 but it will faint the 5th turn).
Dark Pulse is useless, get rid of it for HP Ice to wreck Dnite n stuff.
U-turn is scouting for counters.
Scizor
Breloom already has a similar role, I think you should replace it with a spinner.
Starmie @ Life Orb/Leftovers
EVs: 4 Def / 252 SpA / 252 Spe
TImid Nature
- Hydro Pump/Surf
- Thunder
- Recover/Ice Beam
- Rapid Spin
Great attacker and spinner.
Hydro Pump and Surf is personal pref, but try out both.
Thunder is better than TBolt in rain.
Recover is reccomended for better survivability, but Ice Beam can be used to wreck Dnite which is a pest and gets great coverage with Thunder.
If you use Ice Beam, go with lefties.
Rapid Spin helps the team and Tornadus.
Alternatively, Forretress is also an option. I suggest the specially defensive variant since Politoed should already be physical.
Forretress @ Leftovers
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
- Spikes/Toxic Spikes
- Stealth Rock
- Rapid Spin
- Volt Switch/Gyro Ball/Earthquake
Forretress also gives the team less of a electric weakness, though I thought Whiscash, Breelom and Raikou should be able to hande it well enough.
More info
Breloom
This looks good altough Life Orb can be used to make it more dangerous.
I hope these suggestions come to some good use.
