Looks like you have Volt Switch (Raikou's main purpose that it's sets tend to be built around) covered in Rotom-W; so Raikou doesn't seem the best fit on this team imo. I think you honestly are on the right track with Scarf Keldeo as it lets you beat stuff the rest of your team would otherwise have a lot of trouble with like Lop and Lando. The recommended set for Scarf right now is Hydro/Secret/Scald with a choice between Icy Wind and HP Electric. Icy Wind is mostly for Latis so personally I'd for HP Electric to take down Gyara and other bulky waters like Slowbro; unless you have a specific target in mind for HP Ice?Sure thing, with this team I just reached 1400 on SD.
Lopunny @ Lopunnite
Ability: Limber
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- High Jump Kick
- Return
- Fake Out
- Ice Punch
Bisharp @ Life Orb
Ability: Defiant
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Knock Off
- Sucker Punch
- Iron Head
- Swords Dance
Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 88 Def / 168 SpD
- Stealth Rock
- Leech Seed
- Power Whip
- Spikes
teleGOD (Clefable) @ Leftovers
Ability: Unaware
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
- Moonblast
- Flamethrower
- Calm Mind
- Heal Bell
Keldeo @ Choice Scarf
Ability: Justified
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Scald
- Secret Sword
- Hidden Power [Ice]
- Hydro Pump
Rotom-Wash @ Leftovers
Ability: Levitate
EVs: 248 HP / 216 Def / 44 Spe
Bold Nature
- Volt Switch
- Hydro Pump
- Will-O-Wisp
- Pain Split
Finally, I'd remove Ice Punch from Lopunny for a more useful move like Substitute, Baton Pass, Healing Wish etc. It's generally only good for Lando on the switch and you have Lando covered in Keld and arguably Rotom anyway.