What is the point of Kachina's burst without cons

idk i might be missing smth but just increasing the size of her skill's slams doesnt seem very impactful. ik with constellations you refill some nightsoul points and increase your defense while your in the field though. but what is even the point of kachina's burst if you dont have constellations?? is it's main use have smth to do with cinder city?