The dust storm ability for the lighting covers all your bases. The objective of combat is to get a higher combo rating for a higher experience boost. This move stuns all enemys on screen, locking them in place and hitting multiple times. Racking up the combo score with ease. Sure, you can't keep the dust storm held forever, or you hurt yourself but because the lighting stuns enemy's, it's easy to delay each time you use the attack and it will still combo.
I did this one a group and got a combo over 1200 and a nice chunk of bonus experience. In large groups there is no practical reason to use any other strategy but this.