There is no criteria for the height you must enter or exit a maneuver. They will flow from one to the next. In other words, if one maneuver ends low, the next one will start low. For the ones you listed, the aresti is drawn this way so you will know what direction to fly them. All of these will enter and exit at approximately the same altitude.

Let me know if you need a better explanation.

Good Luck
Gary H.