Hello! I need a lot of BP items so I'm going to start battling in the battle maison. I need to check my team, I have a couple of doubts. This is my team:

Kangaskhan (F) @ Kangaskhanite
Ability: Scrappy
EVs: 252 Atk / 120 Def / 136 Spe
Adamant Nature
- Fake Out
- Return
- Power-Up Punch
- Sucker Punch

Crawdaunt
Ability: Adaptability
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Dragon Dance
- Knock Off
- Aqua Jet
- Superpower

Dragonite @ Lum Berry
Ability: Multiscale
EVs: 20 HP / 252 Atk / 236 Spe
Adamant Nature
- Earthquake
- Dragon Dance
- Outrage
- Fire Punch


Questions: What items should I use in Crawdaunt until I have Focus Sash?
Should I replace Superpower with Waterfall?
Should I replace Dragon Dance in Dragonite with something else? (Ex.Speed, Hurricane)
What's the fastest way to get PB? Single Battles or Double?

Any other suggestion is welcomed.