Best set for a bulky attacking Dragonite?

Dragon Dance is still the scarier version in a lot of tiers, you just give up some of the bulk. Either way, with Multiscale you want it coming in on something that can't touch it, not as a sack after something faints.

Multiscale is the whole set really, so the item is Heavy-Duty Boots. Stealth Rock takes 25% off Dragonite on every switch in and that's Multiscale gone. Roost lets you reset it. Moves usually look like Extreme Speed, Earthquake, Roost and Fire Punch or Ice Spinner for coverage. On SV, Tera Normal Extreme Speed is the reason anyone runs it without Dance. EVs go max HP and Attack, or move some into Defense if your team is weak to physical attackers. To answer the question: yes, as long as you look after the hazards.