Currently I have been running this set for Dragonite when I battle people online and I think it's a great set.
Dragonite @ Lum Berry
Ability: Multiscale
EVs: 252 Atk / 4 Def / 252 Spd
Adamant Nature
- Dragon Dance
- Dragon Claw
- Fire Punch
- ExtremeSpeed
I feel like Lum berry is more of a defensive play so you can get a free DD or start an unstoppable sweep if something tries to burn / paralyze / poison you.
However, I see there are people who also are smacking a Weakness Policy onto their Dragonites which makes me wonder if I should do that.
I can see some cons for running Weakness Policy (such as being unable to ward off status ailments). But, with Dragonite's Multiscale, if he gets hit with a super effective move he already starts off with +2 Attack and Sp. Attack and survives the attack.
So, while both are probably great to run, which one overall would you run?