Someone on another site suggested that for this deck I should run 2-4 copies of Tropical Beach (which is impossible for me to get ahold of btw), a 4-0-4 Kingdra PLF line with Rescue Scarf, 4 Ultra Ball, 3-4 Enchanced Hammer (against Plasma Toolbox), and 1 Computer Search.
IMHO, utilizing Tropical Beach is a matter of playing style. Since I've not ever used it in any of my decks, I can manage well without it.
As for Zebstrika NXD for Disconnect, yeah it's not bad but it's a free prize for Landorus and Terrakion.
And Thundurus (EP) is prize bait for Landurus EX, just like Thundurus EX can 1HKO Emolga (with a HtL or a Deoxys EX on the bench). But, I do like both of these Poke as potential starters. After recognizing the matchup, you can switch to the Poke that is better suited to deal with the defending Poke.
I still think Empoleon slows this deck down drastically sure it only needs 1 energy attachment just like Kingdra does but you're still going to end up exhausting up your Rare Candies unless you run 1-2 Prinplup and/or Seadra to ease up on using Candy so much. How do you expect to hit for 170+ damage with this deck without a damage output boost from x2 Weakness?
Agreed that a 2nd stage 2 line slows the deck down, but I'm still able to "consistently" (i.e., 80% of the time) have either Kingdra or Empoleon attacking t2. Despite the Diving Draw, I like Empoleon's Attack Command as an option to inflict 80+ damage for a single energy - which can be huge early game.
What I did find earlier without Empoleon is that I could not inflict 80+ damage more than 2 consecutive turns. But, you do give up some deck speed. After going back and forth a few times, I believe the "best" lineup is just a heavy Kingdra line as the deck's focus.
In play-testing against Darkrai EX-Sableye, LMT (Landorus-Mewtwo-Tornadus) and RayEeels, I altered your list to better fit my playing style and included:
- 4 Max Potions. In my experienced of running 1-energy attackers, MPs are vital.
- 1 Keldeo EX. I do not like being held "captive" by a status condition. Two Float Stones were also added. A by-product of adding this Poke too is that I also have a Poke that can inflict 80+ damage ("magic" number for me).
Kingdra is a fun deck to play - games turn into a real chess match. So, will it be viable in a tournament given the 30-minute match limit...? Don't know yet, but I'm still play-testing it.