My best advice is to not try and memorize the entire turn in one go. Practice and study each part as it comes and don't worry about stuff that comes later. Practice, practice, practice!Â
Do that until the first half of the fight is so easy it bores you, then repeat for heavensfall phase and divebombs phase.
Do that until the first half of the fight is so easy it bores you, then repeat for heavensfall phase and divebombs phase.