Mix up your opponents with sporadic movement in neutral.
The air movement options in MBTL are insane. You have a super jump, a double jump, and an air dash. They're just like combos, as they can all be done at any point in the air once. There is no reason for your approach to be stale. Spend time in training mode doing all the different combinations to see which one feels most natural, then mix that up as much as you can in battle.