its call lightning in essence, so I call on the telekinesis rule"lots of attacks are nice, but 2d6 for each of five attack roles not equal to 10d6 damage."

so, 10d4 with 5 saves for knock back over 5 rounds, each 2d4 getting an attack roll. less damage in the end, but lots over time, with a nice rider. then normal adds burst to the picture, and greater makes it fire ball on a stick...