>>48318542other notes, you can ult to push people deep into your flux zone or theirs so you can get a kill while they are slow or let a teammate score.
also in flux zones you move at full speed with fly active so you dont need to be afraid to really push to thirst a kill.
when teammates are scoring you can abuse the extra vision you get in the air with fly to see an enemy further away and keep an enemy away from your teammate so they can finish their dunk.
if jungling you can ult northwards and catch both queen bee and the audino taking them with you to mid. This often confirms a bunch of contested exp for you and is worth burning the ult for.
in settings make it so the camera pans while aiming moves to make the ult easier to aim.