[dragonomega]

If you're worried about Focus Blasts accuracy on Thundurus just change it to Hp Ice.

Thunder + Hp Ice could create the infamous combo; BoltBeam (Which is Thunderbolt and Ice Beam) but variations work. Thundurus also wants a Timid nature. Since Attack isn't being used.

Mienshaos Ev's are messed up. I see you're trying to run a mixed set.

I use Mienshao on nearly all of my teams running this set; 212 Atk / 44 SpA / 252 Spe / Naive nature.
U-Turn / Hp Ice / Fake Out / Hi-Jump Kick

I'd also make Kingdra full on offensive, with 4 Hp / 252 Spa / 252 Spe @Choice Specs and a Modest nature.
Surf/Hydro Pump / Ice Beam / Draco Meteor/Dragon Pulse / Flash Cannon

It's movepool may not be bustling but it works with what it has. Set-Up the rain and watch her destroy things.

Make sure Jellicent has Water Absorb. It makes things a lot easier when covering Thundurus/Armaldo against Water type Moves.