So you ran Trick Room. It seems like a good one to boot. KeepBayleefing beat me that day to, and he won so I guess he was able to get by with no real unification. I guess the rule goes like this:
Have a basic unification, ex. Rain, Trick Room, and you do superb at Regionals
You need to mix it up at nats in order to place high like using odd-ball pokemon such as Cacturne
You really need to mix it up at worlds. Never been to worlds but it seems like the challenge is so intense.