Jumper

I found this one to be easier in the third level where you fight a lot of the worker enemies. (They don't counter very often.) Have some finisher meter built up. Group some enemies together and begin hitting one, on the the second or third hit launch into a finisher (the one from the right I think) preferably the one where you teleport around all fast like and hit multiple enemies. After the finisher begins to wear down keep hitting some attack buttons and you will get some extra hits in. If done correctly your character will yell or shout or something.