Right now I run a Quiet Politoed, a Modest Kingdra, a Brave Ferrothorn, a Timid Rotom-W, a Jolly Weavile (my only Fake-out priority attacker), and, of course, Dragonite.
In the wifi battles I've tested it in, Leftovers has been priceless, but the occassional Dragon-type usually destroys me. Dragonite just doesn't have the speed.