@Linneus
True it is dependent upon that, I guess I'm just looking to sweep with kingdra.
Well, the best I can recommend is to keep doing what you're doing. Kingdra's typing lets it get away from pretty much all common water-type counters (as it's not weak to grass or electric), and being afforded free turns while your opponent figures out what to do against you makes Kingdra perfect as a boosting sweeper. (I'm curious exactly what your mixed set is, but that's not too important right now.)
Combining Dragon Dance with strong physical STAB is usually the way to go, since Water and Dragon have good coverage (only Steel types that resist Water can resist this combination, and the only ones that come to mind are Empoleon and Ferrothorn). If you're looking for something to set up early and tear through your opponent's team, try combining Waterfall, Outrage and Dragon Dance with Substitute, as it might net you more boosts. If you're planning on a late game sweeper (which I think Kingdra's just better at), then you might be able to ditch Substitute for another coverage move-- the only problem is that Kingdra doesn't HAVE other coverage moves. In fact, its only other physical moves are Giga Impact and Return... You can risk HP Fire if you're desperate to hit Ferrothorn, but generally speaking, DD/Sub/Outrage/Waterfall is the only physical set worth mentioning.
On the special side, Kingdra can run Rain Dance with Swift Swim as a sort of temporary Agility (which, interestingly, Kingdra already learns, but Rain raises the power of Water type moves, so that's obviously better). An interesting idea would be to forego rain completely for Agility, and then run HP Fire to hit Ferrothorn for that 4x damage and sweep unhindered, but I think it'd just be better to have a Ferrothorn counter on your team.
I guess the thing to keep in mind is that Kingdra can never take on an entire team (few sweepers can). It has a lot of trouble with walls (Physical/Special Kingdra can't just hope to muscle through Ferrothorn/Blissey, respectively, no matter how hard it tries). So get a lot of team support cater to Kingdra's strengths-- high speed and good STAB-- and you won't be disappointed. Like I said, the 'best' set really depends on your team, so if you're making a mixed set work, I'd just stick with that. But SubDD seems to be most popular.