milotic- Gengar Thunderbolt will 2HKO, and if you KO Gengar, I'll just revenge kill with T-Tar Stone Edge
gastrodon- Gastrodon and the following two would be the toughest to beat, but thanks to Sandstorm, even after a CC, Terrakion can survive and give it a second CC, or Gengar can 2HKO with Shadow Ball
Cresselia- Terrakion easily takes a Psychic and can 2HKO with X-Scizor, or T-Tar can 2HKO with Crunch. (It doesn't matter too much at this point if it is hit by T-Wave)
metagross- Tyranitar will die after it uses Earthquake OR Infernape can OHKO with Flamethrower
As you can see, I have my own opinion of your team, which, like you against mine, I have battled similar styles before. Currently, it is merely opinion, but I am hesitant to battle you now after giving away a large part of my strategy/plan, so I will battle you, but not soon. (Sorry, my paragraph was about 1534 characters too long for one message. Read up from the bottom.)