Well, according to this movepool:
https://pokefind.co/wiki/index03a7.php , I would say that a moveset like this one below would be good..
Outrage/Aqua Tail/Dragon Dance/Roost
Not sure if you would be able to learn roost though, but certainly the other moves, as long as the dragonite already knows aqua tail. In terms of ev training, you have 2 main options. You can run with a 252atk/252speed spread, or you can run a more bulky spread, something like 252HP/128def/128Atk (maybe speed in place of attack, more of a preference there). I would prefer the atk/speed spread considering you are using a jolly nature (very lucky, btw).
Also, you could consider playing agility in place of dragon dance or as a backup to aqua tail or roost. With jolly and agility with full speed evs, I'd have thought with one or two boosts, you'll be outspeeding almost anything.
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