I'd probably do a GURPS type of thing with magic where it is not that powerful in the moment but there are good reasons for it to exist and be something to dedicate one's life to. (But no substitute for a good blaster at your side). Keep it mostly operating up at the opera level and less down at the space level.
Mostly useful for Big stuff like using it to hide a planet from a deathstar or make everyone fighting a battle fall asleep.
Still kind of useful for opening a lock or shutting down a sensor or at very high levels fooling the enemy as to where you are so their shots miss.
But it should not be anything devastating
No "instant disintegration by my will"
No fifty arm whirlwind of death telekineses
No "I stopped time so now I can take this hack saw right up to your armor..."
No " I reprogrammed your death robots in but an instant"
No " Your blood is boiling!"
None of that stuff.
Now you may be able to make a thing that does that but it should be expensive and complicated and temperamental and not work very many times or have a 7 month recharge if it does have infinite shots or it ONLY WORKS in the center point of the Donyab Valley on the Planet Keth at the beginning of the wintermist season and it needs a lot of purified neo-copper to burn etc.