Re: KAs vs CvK
One has to remember, that in character terms, an attack doesn't have to be a Killing Attack to be lethal force. An 8-10d6 normal attack can drop a normal person to dying.
The character in question simply needs to use his powers wisely. Using a KA on walls, foci, vehicles, automatons, or villains who can very obviously take it, like Grond or Dr. Destroyer is not a problem. When I played HERO more often, I had characters with KAs and CvK's all the time. It was just a matter of using them judiciously.
I also made sure I had a Stun-only Energy Blast for the soft targets, too.