If fixed 2-3 moves are fine, does that mean these are legal?
Scizor @ Double Hit
Ability: Technician
EVs: 248 HP / 252 Atk / 4 Def
Adamant Nature
- Bullet Punch
- Brick Break / Bug Bite / U-Turn
- Curse
- Roost
Brick Break is used over Superpower to avoid 2 Atk drops. Set probably isn't optimal, but you get the idea.
Hydreigon @ Double Hit
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Dragon Pulse
- Dark Pulse
- Roost
- Fire Blast
Same thing, but with a Special attacker. Hydreigon suffers from the lack of Scarf so it might be good on a Webs team.
Some other good double hit users are probably Mamoswine, Weavile, and Crawdaunt. I could be misinterpreting the banlist but I'm pretty sure these are legal. Essentially doubling the damage of every hit if very strong, but luckily Double Hit has limited distribution and I mentioned the best users in my post.