Weird, hopefully fun idea. Efficient? Heck no.
A 2-for-1 richoceting blast. To start: Blast, Double KB, and Indirect. Being able to shift the angle of attack is needed because having the bad guys line up for the attack is gonna be coincidental and rare. Seems like the best start, but any other ideas are welcome. My big question is, what skill and/or power, in a Combined Power approach, would fit, to get the poor sucker you're knocking around, to pile into the other poor sucker? KS: Geometry, with -5 penalty, and Absolute Direction Sense perhaps?