Do Nighthawk first and get that out of the way. If you have a Platinum pass, you get to go into the park 30 minutes early to get to the line you want to. Not all the park is open for this, but Nighthawk is.
Then the rest of the park is pretty easy after that. Nighthawk is the only really slow loader in the park.
You may want to hit Flying Ace as it is next to Nighthawk and only has the 1 train.
I wonder if Carowinds will get a brony convention next year.