I played Kingdra at CC as well, with 2 - 3rd's and 1 - 2nd so I know how you feel.
Ok, just a couple of ideas...try them out.
Poke 22
4-3-4 Kingdra
1-1 Donphan HGSS
1-1 Blissey
3-3 Claydol
2 Uxie
SST 29
4x Rosy
4x Bebes
4x SSU
4x Candy
3x BTS
3x Expert Belt
2x Pokemon Communicator
2x Warp
2x Luxury Ball
1x NM
NRG 9
2x Fighting (or 1 F and 1 Multi)
7x Water
Another idea and it is based off my Kingdra build, but not exact (I got 2nd place and lost due to bad flips on SSU...which is why I wish there was a Poke Turn for Stage 2 Decks!!!!!!!)
Poke 22
4-3-4 Kingdra
1-0-1 Dusknoir
1-1 Blissey Prime (I had Queen in there before)
3-3 Claydol
2 Uxie
SST 29
4x Rosy
4x Bebes
4x SSU
4x Pokemon Reversal
4x Candy
3x BTS
3x Expert Belt
1x Warp
1x NM
1x Luxury Ball
NRG 9
2x Cyclone
7x Water
The 3-3 Claydol really helps with putting cards in your hand to discard and pulling into your belts. I usually had 2 Claydol on the bench and either Queen or Noir depending on the game, with another Kingdra ready to go...good luck.