In our district you can do whatever you want when you are out of the box. I was advised to stick with some basic maneuvers (or 180* turns), just so I don't confuse the judges into thinking I'm still in the box.

Another thing that I learned later (and is pretty important) is once you finish the sequence, don't do any fancy turn-arounds - just make a deliberate turn and get in the landing pattern. Often we are flying with two flight lines competing at once, and dilly-dallying after your sequence can be hazardous if it interferes with the other flight line.

1/2 Reverse Cuban 8 will keep you on your current line, with some small rudder corrections if need be, and give you the maximum amount of space to setup for the next portion of the sequence. The Humpty Bump has become my favorite for adjusting my line a in/out, but I wouldn't bother trying to learn a new maneuver just for that. A Stall Turn ideally should be executed into the wind, so using it to adjust your line isn't the best idea (it also offers minimum correction if done properly, and doing an ugly stall turn for your turn around could subconsciously affect the judges).

I'm sure my mentor would say to stick with the 1/2 reverse cuban or a 180* turn