I wouldn't do Miss Adventure Falls or Crush N Gusher first. We love TL, go there a lot. First, I should say that no matter what you choose, you'll have some time. The first hour the park is open, it's pretty easy to get on anything you want.
First thing I'd recommend is Humunga Kowabunga. Even though it has 3 slides, it's ride capacity is lower, and the line builds up a bit quicker. I'd hop on that first, then head to Crush, and last would be Miss Adventure. The line for Miss Adventure will get longer during the day, but it has a decent capacity...up to 4 per tube and it has a lot of tubes.