In Giant Kill mode Kai with the Pheonix Talons is the best When you start the battle you are most likely to be the giant if playing offline As soon as you start wait until everyone encircles you and press Y repeatedly After you mass about 10 kills it seems like there will be much more than usual but there is not They will become smarter and try to back you into a corner which is very annoying At this point pick up the hammer and repeatedly press Y Because you are the giant you are more powerful than a regular fighter About three swings should kill a group Do not worry about health you have a lot