New DLC just broke the game (Kasumi).
Flashbang has 6 second stun (can't use weapons, tech, biotics), EVEN on protected enemies (barriers, shield, armor), and has a 9m radius. Can be used as your bonus talent as well.
And shadow strike does 450 damage with an 80% reduction in cooldown if it kills the target (w/ 20% tech cooldown and 20% from passive talent pretty much none).