>>536836829
Considering that she's echo damage dealer, my guess is that she makes one big nuke and then her spirit amplifies her attacks for next few seconds. Either a nuke or nuke and additional attacks are echo skill damage.
As her gun is double barrel sawed off, would be dope if during ult animation, she would quickly close the distance and make a point-blank shot. Additional attacks could be "magic" as she was shown to use some energy attacks from her other hand.