I'm tempted to do the Durant/Focus-Energy Scizor thing soon. I went and got a Truant Durant in a ball I like, so breeding wouldn't be hard, and I've already got a second 5IV Scizor (my shiny one is reserved for Mega atm). Even if it's a really slow strategy, I can see it working well.
My personal favorite is that Scrafty that Spams focus punch, it kept spamming it on my dragonite for almost no damage, it used it about 10 times before I got bored and killed it...
That mega khan is there to lure the AI into using fighting types that dragonite can setup on 9/10 times. It might have won me one or two fights but the bulk of the work was from Dragonite. For example round 43 opened with Terrakion spamming Sacred Sword over and over again, so I ddanced to max and swept that and the following regice and raikou.
Just watch out for Spiritomb that thing is vicious.