Use stasis on anything with a target marker 75 times. You can actually cast this on the Citadel transport stations. Cast Stasis, then Adrenaline Rush, then cast Stasis again. Wait for both to recharge and repeat.
Although, casting stasis 75 times during the course of a playthrough with several assignments won't take long and this can be a handy biotic power to keep more difficult enemies at bay when fighting additional enemies.