I played T+L to death trying every strategy I could come up with short of powerleveling and got a whole ton of nowhere. I might just bite the bullet one of these days and get Xatu or Kadabra to like 40ish.
Fun fact: it turns out if you Skill Swap Levitate off of something, its partner will NOT Earthquake it to death.
Oh, and I lost interest a bit once I realized that the main strategies I was planning on using I picked up from a LLC run I did on GameFAQs once in which Shedinja, Wobbs, X items, and switching Pokemon (other than Shedinja and Castform) out of your party were all banned, but you could use whatever you wanted. Everyone got behind using REALLY fast Pokemon with Screech (Crobat, Electrode, Ninjask), Paralysis (Secret Power, Thunder), residual damage (Toxic, Leech Seed), and priority moves (Swellow, Absol, Breloom).
And I'm still convinced Spionk could have been PIVOTAL.