Air-Demos and Air-Bumps are useful skills that can cause the opposing team's positioning to be ruined. It can also be used in a 1v1 game, the most popular version of this skill is the Air-Dribble to Air-Bump. As strong as this skill is, using it many times a match isn't advised. It will put you out of position and can leave your goal open for attackers.
Figure out the trajectory that the opponent will need to take to save a goal or take a shot.
Based on their momentum Aerial to where you can Demo or Bump them the fastest.
Focus on recoverys after an attempt. This is a high risk high reward skill and will put you out of position, possibly without boost.
Bumping a player out of their Aerial when attempting to defend can crush opponents. Like Air-Demos, an Air-Bump is a very high risk but high reward skill. It can win you the game but it puts you out of positing.